Volume 7, Issue 2 e1849
ORIGINAL RESEARCH
Open Access

Understanding the impact of socioeconomic and health factors on geriatric depression: A comparative study in rural and urban Bangladesh

Mohammad Kamal Hossain

Mohammad Kamal Hossain

Department of Statistics, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj, Bangladesh

Contribution: Conceptualization, Formal analysis, Methodology, Visualization, Writing - original draft, Writing - review & editing

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Md. Nazrul Islam

Md. Nazrul Islam

Department of Statistics, Shahjalal University of Science and Technology, Sylhet, Bangladesh

Contribution: Funding acquisition, ​Investigation, Project administration, Supervision, Validation, Writing - review & editing

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Mohammed Taj Uddin

Mohammed Taj Uddin

Department of Statistics, Shahjalal University of Science and Technology, Sylhet, Bangladesh

Contribution: Data curation, ​Investigation, Project administration, Resources, Supervision, Writing - review & editing

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Md Sabbir Hossain

Corresponding Author

Md Sabbir Hossain

Department of Statistics, Shahjalal University of Science and Technology, Sylhet, Bangladesh

Correspondence Md Sabbir Hossain, Department of Statistics, Shahjalal University of Science and Technology, Sylhet, Bangladesh.

Email: [email protected]

Contribution: Data curation, Formal analysis, Software, Writing - original draft, Writing - review & editing

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First published: 30 January 2024
Citations: 1

Abstract

Background and Aims

The prevalence of depression among the elderly is a growing concern, and this study examines the differences between urban and rural areas in terms of geriatric depression.

Methods

Using a two-stage random sampling approach in urban areas and a multistage random sampling approach in rural areas, the study surveyed 944 elderly individuals of both sexes.

Results

The results indicate that the prevalence of depression was high, with 52.5% of the elderly population experiencing mild to severe depression. The study found that increasing age, female gender, nuclear family structure, and involvement of housewives or others were significant factors affecting depression in urban areas, while increasing age and elderly people without spouses were significant factors in rural areas. Additionally, the study identified hearing impairment, asthma, and arthritis as risk factors for depression in rural areas, and bronchitis, heart disease, and thyroid illness as significant factors in urban areas.

Conclusion

These findings highlight the need for policymakers to focus on addressing the mental health needs of older people, particularly women and those without spouses.

1 INTRODUCTION

Globally, depression has been a leading cause of disability for many years and is a major mental health issue among the geriatric population.1 Even though, after adjusting for population size, disability, and suicide, they are comparable across nations of all economic levels, the absolute cost of depression-related disability and suicide are disproportionately felt by low- and middle-income countries.2

Age has a significant role in determining mental health. Old age is a time of transition when one must cope with issues impacting their emotional and social well-being in addition to the physical aging process. The total prevalence of mental and behavioral diseases tends to rise with age due to the normal aging of the brain, declining physical health, and cerebral pathology. Other significant risk factors for a higher incidence of mental and behavioral problems include disability brought on by a variety of illnesses, loneliness, a lack of family support, a lack of personal autonomy, and financial dependence.3-5

Depression is the mental illness that affects the elderly the most out of all others. Depression affects a person's quality of life and makes them more dependent on others. Elderly people may experience major clinical and social consequences from untreated depression.6, 7 Depression is accompanied by a broad spectrum of symptoms, some of which are unique to each person. Because their symptoms might differ from those of younger people, depression in older people can be challenging to identify. People might be unwilling to discuss their feelings, or they could exhibit other, less evident symptoms of sadness.8 Thus, doctors won't be as likely to detect depression in their patients. Occasionally, elderly adults who are depressed have fatigue, difficulty sleeping, or feel stingy and irritable. Also, older people may suffer from more physical diseases, including cancer, heart disease, or stroke, all of which can exacerbate depressive symptoms. Another possibility is that they are taking medication with side effects that aggravate depression.9, 10

According to several studies, depression was more common among older females. Aside from advancing age, living in rural areas, being illiterate, having a lower socioeconomic standing, and being jobless, other demographic characteristics associated with depression in the elderly include being single, divorced, or widowed, living alone, and being old. Loneliness, inadequate social and familial support, dependency, a lack of affection in the family, inadequate time spent with children, stressful life events, perceived poor health, a lack of spirituality, and a higher reliance on emotion-based coping are among the many psychosocial factors that have been linked to depression in the elderly. Lack of hobbies, inconsistent eating patterns, substance use/smoking, and insufficient exercise are among the lifestyle and nutritional variables that have been related to depression.6, 11-13

The number of elderly persons (those 60 and over) is thought to be around 900 million, or 12% of the world's population. By the year 2050, it is expected that this number will have more than doubled (to two billion), with 80% of those people residing in low- and middle-income nations such as Bangladesh. WHO reports that 7% of old people worldwide are reported to have depression and that 15% of elderly people worldwide suffer from a mental condition.14 Due to its large population and rising geriatric population, Bangladesh might experience a significant increase in the number of these mental health issues.15 Elderly people frequently experience various chronic conditions in addition to lacking social networks and support. The elderly frequently eats meals low in vitamins and minerals due to concurrent poverty. They are frequently more susceptible to depressive illnesses because of these impairments. The lack of certain micronutrients in the diet, such as folate and vitamin B12, contributes to the pathophysiology of depression. These nutrients have significant regulatory effects on brain processes.16-18

Several studies have been conducted on geriatric depression, its symptoms, risk factors, and suicidal thoughts.19-22 This study aims to address the gap in community-based research on depression among the elderly in Bangladesh, specifically by comparing rural and urban populations using a condensed version of the geriatric depression scale (GDS). By identifying sociodemographic factors and health indicators associated with geriatric depression, the study hopes to shed light on the unique challenges faced by elderly individuals in these communities. Ultimately, the findings may inform policymakers and healthcare providers on how best to support the mental health needs of the elderly in Bangladesh.

2 METHODS

2.1 Data source

The current study utilized data from a cross-sectional survey of men and women aged 55 years and older, residing in the Sylhet District of Bangladesh. A multi-indicator survey design was employed to gather information on various aspects related to the health of the elderly, using a structured questionnaire. The sampling approach included two-stage random sampling for urban areas and multistage random sampling for rural areas in the Sylhet District, resulting in a sample size of 944 elderly participants, with equal representation from both rural (n = 472) and urban (n = 472) areas. The data collected for the study included a range of health-related information, such as self-reported health problems, biomarkers, daily activity performance, the GDS for short form, and sociodemographic details of the participants. It is important to note that while other studies may have utilized the same data source, the current study is unique in its research focus and methodology.

2.2 Study design

2.2.1 For first phase

In this study, a two-stage cluster sampling approach was employed to select samples from the Sylhet City Corporation regions, specifically targeting individuals aged 55 years and older. It is worth noting that the Sylhet City Corporation is composed of 27 administrative wards. Around half (13) of the 27 wards were chosen at random in the first round. To ensure a minimum sample size of 472 from each chosen ward, at least 35 elders, both male, and female, were randomly chosen in the second stage.

2.2.2 For second phase

The primary objective is to employ in-person interviewers to gather data on adult health indicators. At least 472 random samples were taken from several Union Parishads, Union Health Complexes, and religious locations where old people are frequently encountered to accomplish this aim. Aged adults (55 and over) from rural regions in Sylhet District were chosen for the sampling unit using multistage random sampling procedures. The study was conducted in the Sylhet District, which comprises 13 upazilas. To ensure representation from different regions within the district, a simple random sampling (SRS) technique was employed in the first step, and four upazilas were selected at random, which amounts to roughly one-third of the total upazilas in the district. One union parishad has been chosen by SRS from each chosen upazila for the second round. SRS has chosen two wards from each chosen union parishad for the third stage. In the fourth stage, 472 respondents were covered by at least 55 senior citizens, both male, and female, who were picked at random. Eight administrative wards were ultimately chosen. For the subject of research, a list of union councils and religious sites (Mosques, Temples, and Churches) from which samples will be drawn has been prepared at random.

2.3 Sample size selection

2.3.1 For first phase

The study's population size was N = 35,917, with N1 representing male elderly and N2 representing female elderly. The appropriate sample size was determined using the formula,
n = z 2 p ( 1 p ) 2 e 2 381 $n=\frac{{z}^{2}p({1-p)}^{2}}{{e}^{2}}\approx 381$
where z = 1.96, p is the proportion of male elderly = 0.55, and e is the margin of error = 0.05, resulting in a sample size of approximately 381. The proportional allocation of sample sizes yielded n1 = 210 for male elderly and n2 = 171 for female elderly. The study ultimately gathered information from 472 elderly people residing in the urban areas of Sylhet City Corporation to accommodate for the complexity of the sampling process.

2.3.2 For second phase

The minimum required sample size can be calculated using the formula,
n = p ( 1 p ) z 2 α / 2 d 2 384 $n=\frac{p(1-p){{z}^{2}}_{\alpha /2}}{{d}^{2}}\approx 384$
where n is the sample size, z is the value of a two-sided normal variate at a 95% confidence level (1.96), p is the estimated proportion (0.5 in cases where the outcome is uncertain), and d is the desired precision (0.05 or a maximum of 0.10). For this study, information on 472 elderly individuals was collected from rural areas of the Sylhet District to account for its complexity.

2.4 Measurement of GDS

Depression poses a significant public health challenge in Bangladesh, with a higher prevalence among older individuals compared to younger ones. Therefore, there is a pressing need to investigate and address depression among the elderly population. The GDS was specifically developed for use in older adults and has been successfully adapted and validated in various languages and elder populations worldwide.23-26

The GDS is a self-reporting tool designed to assess depressive symptoms in geriatric individuals. It comprises 30 questions (known as the original GDS Long Form) that older adults respond to with “Yes” or “No” based on their feelings over the past week.23, 27 This widely used instrument simplifies the screening process for depression in older populations. Recognizing the need for a shorter assessment tool, a 15-item version of the GDS (GDS-15) was developed by selecting questions from the original Long Form that exhibited the strongest correlation with depression.24 These 15 items encompass emotional, cognitive, and behavioral aspects related to life satisfaction, feelings of helplessness, reduced activity or interest, and other indicators of depression. Respondents answer with “Yes” or “No,” and the total score can range from 0 to 15, with higher scores indicating a higher likelihood of depression. Specifically, when 10 out of the 15 items are answered affirmatively, it suggests the presence of depression, while the opposite is true for the remaining items (question nos. 1, 5, 7, 11, 13). The GDS-15 is particularly suited for physically unwell or mildly to moderately cognitively impaired patients who may have limited attention spans or tire easily. It is a quick assessment, typically taking 5−7 min to complete. Importantly, the GDS-15 is a validated tool for identifying depression in elderly individuals residing in community settings. In our study, we utilized the short form of the GDS-15 to assess geriatric depression (Table 1).

Table 1. Variables related to geriatric depression scale (short form).
Choose the best answer for you have felt over the past week
No Questions Answer
1 Are you basically satisfied with your life? [No = 1, yes = 0]
2 Have you dropped many of your activities and interests? [No = 0, yes = 1]
3 Do you feel that your life is empty? [No = 0, yes = 1]
4 Do you often get bored? [No = 0, yes = 1]
5 Are you in good spirits most of the time? [No = 1, yes = 0]
6 Are you afraid that something bad is going to happen to you? [No = 0, yes = 1]
7 Do you feel happy most of the time? [No = 1, yes = 0]
8 Do you often feel helpless? [No = 0, yes = 1]
9 Do you prefer to stay at home, rather than going out and doing new things? [No = 0, yes = 1]
10 Do you feel you have more problems with memory than most? [No = 0, yes = 1]
11 Do you think it is wonderful to be alive now? [No = 1, yes = 0]
12 Do you feel pretty worthless the way you are now? [No = 0, yes = 1]
13 Do you feel full of energy? [No = 1, yes = 0]
14 Do you feel that your situation is hopeless? [No = 0, yes = 1]
15 Do you think that most people are better off than you are? [No = 0, yes = 1]
Total score 15

2.5 Statistical analysis

2.5.1 Univariate analysis

Univariate analysis has been used to find the frequency distribution of several sociodemographic variables such as the age of the elderly, sex, religion, marital status, literacy, family size, types of families, residence, living arrangement, education, occupation, and so forth. In any study, the frequency distribution is important, and primarily it is used to know the nature of sample data. Some descriptive measures such as means, standard deviations, and so forth were calculated for geriatric depression and frailty in the elderly according to respondents' age, sex, residence, and religion.

2.6 Bivariate analysis

2.6.1 χ2 test of association

To study the relationship between two attributes, the frequency distribution is the first step, although this distribution does not allow quantifying or testing that relationship. For this purpose, it is useful to consider different indexes that measure the extent of association as well as a statistical test (χ2 test of association) of the null hypothesis that,
H o : There is no association ${{\rm{H}}}_{{\rm{o}}}:\mathrm{There}\,\mathrm{is}\,\mathrm{no}\,\mathrm{association}$
And the alternative hypothesis is,
H 1 : There exists an association ${{\rm{H}}}_{1}:\mathrm{There}\,\mathrm{exists}\,\mathrm{an}\,\mathrm{association}$

To test the existence of interrelationships among the categories of two qualitative variables, the χ2 test of association is performed.

2.6.2 Binary logistic regression

Logistical regression is the appropriate statistical technique when the dependent variable is a categorized (nominal or nonmetric) variable, and the independent variables are metric or nonmetric variables.28 In other words, multinomial analysis is the appropriate procedure if the single dependent variable is multichotomous (e.g., high–medium–low) and therefore nonmetric.

To determine the relationship between response variables and one or more explanatory variables, regression methods have become an integral component. Binary logistic regression analysis is the most widely used technique when the dependent variables are categorized into two categories (e.g., yes or no). In this study, we utilized a regression model to determine which sociodemographic factors, daily living activities, and health variables had the most significant impact on the GDS score of older adults. That's why GDS is considered for this model and categorized in the following way:29
Y = 1 , if GDS Score > 6 to 15 ( Depression ) 0 , if GDS Score < 0 to 5 ( Normal ) $Y=\left\{\begin{array}{c}1,\mathrm{if}\,\mathrm{GDS}\,\mathrm{Score}\gt 6\,\mathrm{to}\,15\,(\mathrm{Depression})\\ 0,\mathrm{if}\,\mathrm{GDS}\,\mathrm{Score}\lt 0\,\mathrm{to}\,5(\mathrm{Normal})\\ \,\end{array}\right.$

2.7 Multiple logistic regression analysis

Furthermore, we used binary logistic regression to assess the influence of explanatory variables of geriatric depression. The variables identified in the univariate analysis (p < 0.20) were then included in the final multivariable logistic regression model.

2.8 Statistical tools for analysis

The study used several descriptive and inferential statistical tools and techniques for data analysis. For this purpose, MS Excel and SPSS (Version-20) software were used.

3 RESULTS

3.1 Background characteristics of the elderly concerning place of residence

This study included 944 elderly people both male and female including urban and rural areas from Sylhet District, Bangladesh. Among them more than half (61%) of the elderly were male and 39% were female in urban areas whereas 47% of the elderly were male and 53% were female in rural areas (Figure 1).

Details are in the caption following the image
Percentage distribution of elderly with respect to sex and locality.

Table 2 represents the background characteristics of the elderly according to sex in urban and rural areas. This table shows that respondents' chronological age (CA) started from 55 years, with an average CA of 62.90 (SD ±9.32) years for rural and 62.43 (SD ±8.57) years for urban. In the age group 55−59, about 47% were male and 53% were female in rural areas whereas 61% were male and 39% were female in urban areas. Maximum elderly of the age groups 70+ and 55−59 belong to rural and urban, respectively. Due to the fast urbanization happening in Bangladesh, the traditional joint family system is gradually disintegrating. It is found that the significant difference in the rural and urban elderly family structures were 59% joint or extended families in rural and 53% in urban areas. These findings are like many other studies conducted in Sylhet.

Table 2. Background characteristics of the elderly concerning place of residence.
Characteristics Response Frequency (rural) Frequency (urban)
Male Female Total Male Female Total
n (%) n (%) n (%) n (%)
223 (47.2) 249 (52.8) 290 (61.4) 182 (38.6)
Age 55−59 78 (34.2) 150 (65.8) 228 (48.3) 121 (57.3) 90 (42.7) 211 (44.7)
60−64 44 (51.2) 42 (48.8) 86 (18.2) 44 (46.8) 50 (53.2) 94 (19.9)
65−69 25 (54.3) 21 (45.7) 46 (9.7) 53 (79.1) 14 (20.9) 67 (14.2)
70+ 76 (67.9) 36 (32.1) 112 (23.7) 72 (72.0) 28 (28.0) 100 (21.2)
Education Illiterate 154 (41.0) 222 (59.0) 376 (79.7) 113 (43.8) 145 (56.2) 258 (54.7)
Literate 69 (71.9) 27 (28.1) 96 (20.3) 177 (82.7) 37 (17.3) 214 (45.3)
Occupation Service (government/private) 15 (68.2) 7 (31.8) 22 (4.7) 59 (76.6) 18 (23.4) 77 (16.3)
Business 12 (100.0) 0 12 (2.5) 85 (96.6) 3 (3.4) 88 (18.6)
Housewife or others 196 (44.7) 242 (55.3) 438 (92.8) 146 (47.6) 161 (52.4) 307 (65.0)
Type of family Nuclear 96 (35.4) 126 (64.6) 195 (41.3) 150 (68.2) 70 (31.8) 220 (46.6)
Joint or extended 154 (55.6) 123 (44.4) 277 (58.7) 140 (55.6) 112 (44.4) 252 (53.4)
Marital status Married 216 (58.2) 155 (41.8) 371 (78.6) 278 (71.6) 110 (28.4) 388 (82.2)
Unmarried or widowed or divorced 7 (6.9) 94 (93.1) 101 (21.4) 12 (14.3) 72 (85.7) 84 (17.8)
Religion Muslim 210 (47.6) 231 (52.4) 441 (93.4) 254 (60.5) 166 (39.5) 420 (89.0)
Non-Muslim 13 (41.9) 18 (58.1) 31 (6.6) 36 (69.2) 16 (30.8) 52 (11.0)
Smoking behavior Nonsmoker 125 (33.6) 247 (66.4) 372 (78.8) 150 (45.6) 179 (54.4) 329 (69.7)
Smoker 98 (98.0) 2 (2.0) 100 (21.2) 140 (97.9) 3 (2.1) 143 (30.3)
Living alone No 212 (52.5) 192 (47.5) 404 (85.6) 247 (60.2) 163 (39.8) 410 (86.9)
Yes 11 (16.2) 57 (83.8) 68 (14.4) 43 (69.4) 19 (30.6) 62 (13.1)

From Table 2, it was seen that most of the elderly (80%) were illiterate in rural areas and 55% were in urban areas. Also, among the literate, the urban elderly was more literate than the rural and the figure was 45% and 20%, respectively. It was also found that only 7% of elderly were engaged in different services and businesses in rural areas, on the other hand 35% were engaged in urban areas. Only 4.7% were engaged in government and private services in rural areas whereas 16.3% were in urban areas.

Urban and rural smoking behaviors are remarkable. About 30% of urban people smoke whereas 21% were in rural areas. The elderly living alone was found to be the same in both areas. But urban and rural male/female scenario is noticeable. Only 16% of elderly males were living alone in rural areas but 69% were in urban areas.

3.2 Reliability

The degree of internal consistency of the GDS-15 was assessed using Cronbach , and the results showed that it was acceptable. Specifically, the Cronbach's coefficient  was found to be 0.63 for overall data, 0.51 for rural areas, and 0.74 for urban areas.30

3.3 Prevalence of depression concerning locality

The prevalence of depression in participants in rural and urban areas was 54.6% and 50.4%; and the average depression scores were 6.15 (SD = 2.44) and 6.21 (SD = 3.21), respectively. Rural depression scores were higher than in urban areas. According to the survey, the prevalence of depression in rural areas was 49%, with 6% of the population experiencing severe depression and the rest experiencing mild or moderate depression. In urban areas, the prevalence of depression was lower, with 36% of the population experiencing mild or moderate depression and 13% experiencing severe depression (Table 3).

Table 3. Classification of elderly based on GDS-15 scores (N = 944, rural = urban = 472).
Locality Mean (SD) Moderately depressed N (%) Severely depressed N (%) Total N (%)
Rural 6.15 (2.44) 231 (48.9) 27 (5.7) 258 (54.6)
Urban 6.21 (3.21) 177 (37.5) 61 (12.9) 238 (50.4)
Total 6.18 (2.85) 408 (43.2) 88 (9.3) 496 (2.5)
  • Abbreviation: GDS, geriatric depression scale.

3.4 Results on binary logistic regression analysis of depression with sociodemographic and health variables concerning locality

Table 4 displays the results of a binary logistic regression analysis that examines the relationship between sociodemographic variables and elderly individuals. It reveals that the age group 70 and above years of elderly had a higher risk of being depressed than the age group 55−59 years in both areas. For example, elderly people of age group 70 and above years were four times (95% CI: 2.20−6.69, p ≤ 0.01) more likely to be depressive than the pre-elderly age group (55−59 years) in rural areas whereas this risk is almost doubled in urban areas. Elderly age groups 60−64 and 65−69 years were 1.35 (95% CI: 0.97−2.31, p = 0.267) and 2.53 (95% CI: 1.23−5.19, p = 0.012) times more likely to be depressive than the pre-elderly (reference group) age group after adjusting the other variables in rural areas but 1.85 times (95% CI: 1.09−3.16, p = 0.024) and 1.41 times (95% CI: 0.78−2.54, p = 0.256) more depressed than the pre-elderly age group in urban areas, respectively.

Table 4. Binary logistic regression analysis of depression with sociodemographic variables with respect to locality.
Characteristics Adjusted OR (rural) Adjusted OR (urban)
OR 95% CI for OR p Value OR 95% CI for OR p Value
Lower Upper Lower Upper
Age
55−59 (ref.)
60−64 1.353 0.794 2.307 0.267 1.853 1.086 3.162 0.024
65−69 2.526 1.229 5.192 0.012 1.408 0.780 2.544 0.256
70 and above 3.836 2.200 6.687 0.000 2.036 1.169 3.545 0.012
Gender
Male (ref.)
Female 1.461 0.914 2.334 0.113 1.927 1.154 3.218 0.012
Education
Illiterate (ref.)
Literate 0.993 0.579 1.705 0.981 0.768 0.503 1.175 0.224
Marital status
Unmarried or widowed or divorce (ref.)
Married 0.390 0.206 0.738 0.004 0.705 0.396 1.255 0.235
Occupation
Service (government/private) (ref.)
Business 0.735 0.112 4.843 0.749 2.093 1.066 4.109 0.032
Housewife or others 2.264 0.744 6.887 0.150 2.206 1.241 3.922 0.007
Type of family
Nuclear (ref.)
Joint or extended 0.936 0.614 1.426 0.757 0.632 0.422 0.946 0.026
Religion
Non-Muslim (Ref.)
Muslim 1.981 0.810 4.848 0.134 1.569 0.828 2.975 0.167
Living alone
No (ref.)
Yes 1.648 0.788 3.446 0.184 1.307 0.730 2.340 0.368

The sex of elderly individuals has a significant impact on depression in urban areas, but not in rural areas. Urban female elderly had more likely to become depressive (odds ratio [OR] = 1.93, 95% CI: 1.15−3.22, p = 0.012) than the male elderly. The marital status of elderly individuals has a strong and significant impact on depression in rural areas, but not in urban areas. Rural married elderly was less depressive (OR = 0.39, 95% CI: 0.21−0.74, p = 0.004) than the unmarried or widowed, or divorced elderly. The occupation of elderly individuals is found to have a strong and significant impact on depression in urban areas, but not in rural areas. Urban housewives or others had a higher risk of being depressive than the government or private service for the elderly. For example, elderly housewives or others were 2.21 times (95% CI: 1.24−3.92, p = 0.007) more likely to be depressed than the government or private service for the elderly in urban areas. Business persons were two times (95% CI: 1.07−4.11, p = 0.032) more likely to be depressed than the government or private service for the elderly in the urban area.

The respondent's type of family was a significant association with geriatric depression in urban areas but not in rural areas. Joint or extended family members of the elderly were less depressed (OR = 0.63, 95% CI: 0.42−0.95, p = 0.026) than the nuclear family of the elderly in urban areas. Respondent's education, religion, and living alone were not significantly associated with geriatric depression in binary logistic regression analysis.

Table 5 the results of a binary logistic regression analysis that examines the relationship between health variables and elderly individuals in both rural and urban areas. It reveals that self-rating health status has a significant impact on geriatric depression in both areas. The average or poor health status of the elderly was about two times more likely to be depressed than good health elderly in both areas. It also reveals that smoking behavior, feeling lonely, heart murmur, and stroke were a strong significant (p ≤ 0.09) impact on geriatric depression in both areas. In smoking habit, the smoker was less depressed than the nonsmoker of the elderly in both areas. Feeling lonely of the elderly was about eight times more depressed than those who could not feel loneliness in the rural areas but in the urban area, this risk is threefold. Those who had previously had stroke were six times more depressed than those who did not have a stroke in rural areas but in an urban area, this risk is double. In logistic regression analysis, hearing difficulty, asthma, and arthritis were a significant association (p ≤ 0.089) with geriatric depression in rural areas, but these are neutral in the urban area. On the other hand, bronchitis, heart problem, and thyroid disease of the respondents had no significant association with geriatric depression in rural areas but significant impact on depression in urban areas.

Table 5. Binary logistic regression analysis of depression with health variables with respect to locality.
Characteristics Adjusted OR (rural) Adjusted OR (urban)
OR 95% CI for OR p Value OR 95% CI for OR p Value
Lower Upper Lower Upper
Self-rating health status
Good (ref.)
Average/poor 2.332 1.021 5.326 0.044 2.440 1.263 4.712 0.008
Smoking habit
Nonsmoker (ref.)
Smoker 0.562 0.320 0.990 0.046 0.634 0.397 1.012 0.056
Hearing difficulty
No (ref.)
Yes 1.999 1.208 3.310 0.007 1.096 0.675 1.777 0.711
Cataracts
No (ref.)
Yes 1.053 0.600 1.850 0.856 0.942 0.585 1.518 0.806
Vision difficulties
No (ref.)
Yes 1.378 0.792 2.400 0.257 1.101 0.707 1.713 0.671
Asthma
No (Ref.)
Yes 1.685 0.923 3.073 0.089 1.255 0.696 2.262 0.451
Bronchitis
No (ref.)
Yes 0.938 0.407 2.159 0.880 1.932 1.129 3.307 0.016
Arthritis
No (ref.)
Yes 2.788 1.408 5.521 0.003 1.303 0.835 2.033 0.244
Feeling lonely
No (ref.)
Yes 7.623 4.107 14.151 0.000 2.652 1.497 4.700 0.001
Heart murmur
No (ref.)
Yes 0.266 0.138 0.511 0.000 1.782 1.149 2.764 0.010
Heart problem
No (ref.)
Yes 0.677 0.393 1.167 0.160 2.017 1.242 3.275 0.005
Kidney disease
No (ref.)
Yes 0.609 0.185 2.003 0.414 0.633 0.283 1.418 0.267
Liver disease
No (ref.)
Yes 0.388 0.110 1.367 0.141 1.730 0.639 4.686 0.281
Osteoporosis problem
No (ref.)
Yes 1.185 0.695 2.020 0.534 1.255 0.818 1.925 0.299
Seizure
No (ref.)
Yes 2.788 0.764 10.172 0.120 0.495 0.074 3.327 0.470
Stroke
No (ref.)
Yes 5.979 1.311 27.275 0.021 2.243 0.880 5.718 0.091
Thyroid disease
No (ref.)
Yes 0.156 0.011 2.222 0.170 3.265 1.146 9.305 0.027
Diabetic status
No (ref.)
Yes 0.888 0.434 1.818 0.745 1.182 0.738 1.894 0.485
Blood pressure
No (ref.)
Yes 0.910 0.516 1.602 0.743 0.725 0.419 1.256 0.252
Body mass index (BMI)
Well-nourished (ref.)
Overweight 1.916 0.914 4.018 0.085 1.028 0.621 1.699 0.916
Malnourished 0.811 0.482 1.365 0.431 0.816 0.482 1.380 0.448

Respondent's cataracts, vision difficulty, kidney disease, liver disease, osteoporosis problem, seizure, diabetes, blood pressure, and body mass index were not significantly associated with geriatric depression in binary logistic regression analysis in both areas.

3.5 Final multiple logistic regression analysis of depression with sociodemographic variables with respect to locality

To gain a deeper understanding of the relationship between sociodemographic variables and depression among elderly individuals, a multiple logistic regression analysis was conducted, with a particular focus on the distinction between rural and urban localities. The results of this analysis, as presented in Table 6, shed light on the nuanced interplay between various demographic factors and the prevalence of depression in these two settings.

Table 6. Multiple logistic regression analysis of depression with sociodemographic variables with respect to locality.
Characteristics Rural Urban
OR 95% CI for OR p Value OR 95% CI for OR p Value
Lower Upper Lower Upper
Age
55−59 (ref.)
60−64 1.394 0.823 2.363 0.217 1.906 1.122 3.238 0.017
65−69 2.838 1.384 5.818 0.004 1.441 0.802 2.587 0.222
70 and above 4.212 2.453 7.232 0.000 2.211 1.278 3.825 00.005
Gender
Male (ref.)
Female 1.607 1.029 2.510 0.037 2.370 1.514 3.711 <0.01
Marital status
Unmarried or widowed or divorce (ref.)
Married 0.382 0.202 0.725 0.003
Occupation
Service (government/private) (ref.)
Business 2.132 1.091 4.167 0.027
Housewife or others 2.270 1.283 4.015 0.005
Type of family
Nuclear (ref.)
Joint or extended 0.644 0.432 0.959 0.030
Religion
Non-Muslim (ref.)
Muslim 2.167 0.913 5.146 0.080 1.623 0.866 3.040 0.131
Living alone
No (ref.)
Yes 00.564 0.271 1.175 0.126

The impact of age on depression risk remained significant in both rural and urban areas. Elderly individuals aged 70 and above continued to exhibit a substantially higher risk of depression, with an OR of 4.212 (95% CI: 2.453−7.232, p < 0.001) in rural areas and an OR of 2.211 (95% CI: 1.278−3.825, p = 0.005) in urban areas, as compared to the reference group of 55−59 years. This suggests that advancing age is a consistent predictor of depression across localities. In the urban context, gender emerged as a significant predictor of depression. Female elderly individuals in urban areas were notably more susceptible to depression, with an OR of 2.370 (95% CI: 1.514−3.711, p < 0.01), while this gender disparity was not observed in rural areas. Marital status continued to exhibit an impact on depression risk in rural areas, where being married was associated with a lower risk of depression (OR: 0.382, 95% CI: 0.202−0.725, p = 0.003). However, this effect was not observed in urban areas. Occupational differences persisted as significant predictors of depression in the urban setting. Urban elderly individuals engaged in business activities displayed an increased risk of depression (OR: 2.132, 95% CI: 1.091−4.167, p = 0.027), as did housewives or individuals with other occupations (OR: 2.270, 95% CI: 1.283−4.015, p = 0.005). In rural areas, occupation did not exhibit a significant association with depression. Living arrangements continued to influence depression risk in urban areas. Elderly individuals residing in joint or extended families were less likely to experience depression compared to those in nuclear families (OR: 0.644, 95% CI: 0.432−0.959, p = 0.030). This distinction was not observed in rural areas. The variables of religion and living alone did not show statistically significant associations with geriatric depression in either rural or urban areas (Table 6).

3.6 Final multiple logistic regression analysis of depression with health variables with respect to locality

To gain deeper insights into the relationship between health-related factors and depression among elderly individuals, a multiple logistic regression analysis was conducted, focusing on both rural and urban localities. The findings presented in Table 7 provide valuable insights into how various health variables are associated with depression in these distinct settings.

Table 7. Multiple logistic regression analysis of depression with health variables with respect to locality.
Characteristics Rural Urban
OR 95% CI for OR p Value OR 95% CI for OR p Value
Lower Upper Lower Upper
Self-rating health status
Good (ref.)
Average/poor 2.821 1.107 7.191 0.030 3.211 1.518 6.789 0.002
Smoking habit
Nonsmoker (ref.)
Smoker 1.598 0.851 3.000 0.145 1.439 0.873 2.371 0.154
Hearing difficulty
No (ref.)
Yes 1.713 0.995 2.948 0.052
Asthma
No (ref.)
Yes 5.189 1.724 15.619 0.003
Bronchitis
No (ref.)
Yes 1.866 1.043 3.341 0.036
Arthritis
No (ref.)
Yes 3.627 1.679 7.835 0.001
Feeling lonely
No (ref.)
Yes 26.095 12.700 53.620 0.000 19.223 10.110 36.553 <0.01
Heart murmur
No (ref.)
Yes 3.099 1.507 6.374 0.002 1.641 1.012 2.660 0.044
Heart problem
No (ref.)
Yes 0.701 0.400 1.228 0.214 1.826 1.080 3.087 0.025
Liver disease
No (ref.)
Yes 0.305 0.082 1.131 0.076
Seizure
No (ref.)
Yes 4.363 1.177 16.176 0.028
Stroke
No (ref.)
Yes 4.211 0.733 24.194 0.107 1.932 0.737 5.068 0.181
Thyroid disease
No (ref.)
Yes 0.209 0.011 4.059 0.301 2.816 0.869 9.128 0.084
Body mass index (BMI)
Well-nourished (ref.)
Overweight 1.117 00.614 2.030 0.717
Malnourished 1.883 0.822 4.313 0.134

Elderly individuals who self-rated their health as “average/poor” were at a significantly higher risk of depression in both rural (OR: 2.821, 95% CI: 1.107−7.191, p = 0.030) and urban (OR: 3.211, 95% CI: 1.518−6.789, p = 0.002) areas compared to those who rated their health as “good.” While there was a trend towards an increased risk of depression among smokers compared to nonsmokers, this association did not reach statistical significance in either rural or urban areas. In rural areas, experiencing hearing difficulty was not significantly associated with depression. However, in urban areas, the association approached significance, suggesting a potential link (OR: 1.713, 95% CI: 0.995−2.948, p = 0.052). Several chronic health conditions exhibited significant associations with depression in either rural or urban areas: Elderly individuals with asthma had a significantly higher risk of depression in rural areas (OR: 5.189, 95% CI: 1.724−15.619, p = 0.003). In urban areas, having bronchitis was associated with an increased risk of depression (OR: 1.866, 95% CI: 1.043−3.341, p = 0.036). Arthritis was associated with a higher risk of depression in rural areas (OR: 3.627, 95% CI: 1.679−7.835, p = 0.001). Having a heart murmur was significantly associated with depression in both rural (OR: 3.099, 95% CI: 1.507−6.374, p = 0.002) and urban (OR: 1.641, 95% CI: 1.012−2.660, p = 0.044) areas. In urban areas, the presence of a heart problem was linked to a higher risk of depression (OR: 1.826, 95% CI: 1.080−3.087, p = 0.025). Lonely had a profound impact on depression risk in both rural (OR: 26.095, 95% CI: 12.700−53.620, p < 0.001) and urban (OR: 19.223, 95% CI: 10.110−36.553, p < 0.001) areas. Several other health conditions, such as liver disease, seizures, stroke, and thyroid disease, did not exhibit statistically significant associations with geriatric depression in the multiple logistic regression analysis. BMI categories, including overweight and malnourished, did not show statistically significant associations with depression in either rural or urban areas (Table 7).

4 DISCUSSIONS

The study's findings suggest that depression is more prevalent among elderly individuals living in rural areas as compared to those living in urban areas (54.6% vs. 50.4%). These findings were consistent with some studies31, 32 and inconsistent with other studies.33-35 The recent economic developments in terms of improved economic conditions, quality of life, and medical services have probably benefited the urban dwellers more than the rural dwellers.31 Elderly individuals living in rural areas may be at a higher risk of developing depression due to various factors such as family discrimination, financial instability, and physical or mental disabilities, which can lead to increased responsibilities and stress.36

The study's results indicate that there are distinct risk factors associated with depression among elderly individuals living in urban and rural areas. In the urban sample, risk factors such as advanced age, being female, not being engaged in any work (such as being a housewife or unemployed), and living in a nuclear family were significantly associated with depression. On the other hand, the rural sample showed that advanced age and being unmarried or spouseless were significantly associated with depression.

In logistic regression analysis, the respondent's type of family was a significant association with depression in the urban area but not in rural. Joint or extended family members of the elderly were less depressed than the nuclear type of family in the urban area. Similar findings have been reported by other researchers.37, 38 As a result of urbanization, families have become less diverse and more nuclear. Data from household surveys conducted in 43 developing countries in the 1990s indicate a tendency to convert primarily to nuclear households.39

Marital status was significantly associated with the risk of depressive symptoms for rural seniors, but it had no significant effect on the urban sample. Marital status and living arrangements were significantly associated with depression for urban and rural samples of Taiwanese seniors.33 As determined by the authors, the presence of a spouse can help relieve chronic illness and therefore reduce the likelihood of depression.40 Moreover, the higher frequency of depression among widows or divorced or unmarried is not only due to the absence of a partner but can also lead to financial difficulties that reduce psychological scarcity; these consequences of widowhood may be particularly pronounced in the case of older women in rural areas.33 According to a study comparing depression levels across different regions in Europe, unmarried, widowed, or divorced adults were found to report more symptoms of depression compared to married adults.41 The study conducted in the Sylhet District found that elderly individuals in urban areas who were not engaged in any work, such as housewives or unemployed individuals, reported a higher prevalence of geriatric depression compared to those who were engaged in work or service. Other studies37, 42 have also found that the amount of depression is higher among those who do not work and inconsistent with another study.34

The present findings further support the associations between depression and different health conditions. The most noteworthy findings are the specific diseases found to be predictive of depressive symptoms in binary logistic regression analysis. More importantly, different health condition predictions were identified for depressive symptoms in urban and rural samples.

This study showed that self-perceived health status, smoking, feeling lonely, and the presence of different diseases such as heart murmur and stroke were associated with depression in the study area. It is found that hearing difficulty, asthma, and arthritis were independent risk factors influencing depression in rural areas but not in urban areas. On the other hand, the bronchitis, heart, and thyroid diseases of the respondents did not have a significant association with depression in a rural area but significant impact on depression in the urban area.

The results of our study suggest that mild depression is prevalent among elderly individuals in both rural and urban areas of the Sylhet District in Bangladesh. However, comparing these rates with studies conducted in other countries, which use different assessment tools, can be challenging.43 Our study revealed a prevalence of mild depression of 49% in rural areas and 38% in urban areas among elderly individuals. These rates are like those reported in previous studies conducted in the same region.20 Our findings align with previous studies, which have found that mild depression is more common than severe depression among the elderly population.44, 45 The differences in prevalence rates across studies could be attributed to differences in study instruments, settings, sample sizes, or sampling strategies.

5 CONCLUSIONS

The objective of this study was to explore the prevalence of depression and identify sociodemographic and health-related risk factors associated with depression among the elderly population in Sylhet District, Bangladesh. The study revealed that more than half of the elderly population in the study reported symptoms of depression, indicating a significant increase in depression among the elderly in Bangladesh. The high prevalence of depression in the study calls for larger-scale research to confirm the findings and advocate for depression screening as a part of geriatric assessment. The study found that rural elderly participants were more likely to experience depression than urban participants (54.6% vs. 50.4%), and different risk factors were identified for each group. For the urban sample, factors such as increased age, female gender, being unmarried or widowed or divorced, involvement in housewife or other nonwork activities, smoking, Muslim religion, living in a nuclear family, and living alone were significantly associated with depression. In contrast, for the rural sample, increased age and being spouseless were the only significant risk factors identified. Health-related risk factors such as hearing difficulties, asthma, and arthritis were found to influence depression in rural areas, while bronchitis, heart disease, and thyroid disorders had a significant impact on the urban sample. The study highlighted that mild depression was prevalent in both rural and urban areas, with 49% and approximately 38% prevalence rates, respectively. The urban sample had a notably higher prevalence of severe depression than the rural sample (13% vs. 6%). These findings underline the importance of further research to understand the differential impact of rural and urban factors on depression among the elderly population. Screening for depression and targeted treatment should be provided to elderly people, particularly females and spouseless elderly individuals. Longitudinal studies are required to establish causal links between depression and associated risk factors. Similar studies are needed from other regions of Bangladesh to develop a comprehensive understanding of geriatric mental health in the elderly population.

AUTHOR CONTRIBUTIONS

Mohammad Kamal Hossain: Conceptualization; formal analysis; methodology; visualization; writing—original draft; writing—review and editing. Md Nazrul Islam: Funding acquisition; investigation; project administration; supervision; validation; writing—review and editing. Mohammed Taj Uddin: Data curation; investigation; project administration; resources; supervision; writing—review and editing. Md Sabbir Hossain: Data curation; formal analysis; software; writing—original draft; writing—review and editing.

ACKNOWLEDGMENTS

The inhabitants of the research region are sincerely thanked for their cooperation and key informant engagement. The University Research Centre (URC), SUST, received funding for this research work from the People's Republic of Bangladesh (project codes: PS/2018/1/11 & PS/2019/1/35).

    CONFLICT OF INTEREST STATEMENT

    The authors declare no conflict of interest.

    ETHICS STATEMENT

    This research has been granted ethical approval by the Shahjalal University of Science and Technology Ethical Review Board.

    TRANSPARENCY STATEMENT

    The lead author Md Sabbir Hossain affirms that this manuscript is an honest, accurate, and transparent account of the study being reported; that no important aspects of the study have been omitted; and that any discrepancies from the study as planned (and, if relevant, registered) have been explained.

    DATA AVAILABILITY STATEMENT

    The data are freely available via request to the corresponding author.

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