Volume 29, Issue 3 pp. 950-953
Corrigendum
Free Access

Corrigendum

First published: 09 February 2022

In Janbek J. et al. [1], due to an error in the coding of one of the variables used for an adjustment model, some estimates should be changed for accuracy without affecting the conclusions of this study:

Page 411: In Results section, the MRR value need to be changed. The corresponding sentence should read ‘MRR in dementia/infection was 7.35 (95% confidence interval: 7.25–7.45) and was increased for infections of all sites’.

Page 413: In the second paragraph of Results section, the MRR values in the first sentence should be changed. The corresponding sentence should have read as ‘The fully adjusted MRR for the dementia/infection (after dementia) group was 7.35 (95% confidence interval [CI], 7.25–7.45) compared with the reference group (no dementia/no infection), whereas MRR in the no dementia/infection group was 2.93 (95% CI, 2.91–2.95) and in the dementia/no infection group 3.66 (95% CI, 3.62–3.71)’.

Page 413: In the third paragraph of Results section, the last sentence ‘Highest ratios were seen for sepsis followed by uncategorized infections and infections in the respiratory, circulatory, and nervous systems (Table S7)’ should have read as ‘Highest ratios were seen for sepsis followed by respiratory, uncategorized, nervous, and circulatory infections systems’ (Table S7).

Page 414: In the Table 1, the values under the subheading ‘MRR model 3c, 95% CI’ are incorrect. The correct Table 1 is given below.

TABLE 1. Mortality rate ratios in cohort population stratified by sex
Exposure groups N % Pyrs at risk N deaths MRR model 1, 95% CI MRR model 2, 95% CI MRR model 3, 95% CI
All Dementia 112,565 354,456 82,537
Infection (after) 30,323 26.9 57,940 24,894 10.61 (10.47, 10.76) 10.69 (10.54, 10.83) 7.35 (7.25, 7.45)
Infection (before) 36,853 32.7 89,162 27,070 7.78 (7.67, 7.88) 7.85 (7.74, 7.95) 4.78 (4.72, 4.84)
No infection 45,389 40.3 207,354 30,573 4.01 (3.96, 4.06) 4.07 (4.02, 4.12) 3.66 (3.62, 3.71)
No dementia 1,383,871 12,384,679 492,723
Infection 451,704 32.6 1,864,623 253,355 4.68 (4.65, 4.71) 4.75 (4.72, 4.78) 2.93 (2.91, 2.95)
No infection 932,167 67.4 10,520,056 239,368 1 (ref) 1 (ref) 1 (ref)
Total 1,496,436 12,739,135 575,260
Women Dementia 70,162 233,809 51,027
Infection (after) 18,364 26.2 38,408 14,914 9.48 (9.32, 9.65) 9.55 (9.38, 9.72) 6.76 (6.64, 6.88)
Infection (before) 22,415 31.9 57,345 16,275 7.26 (7.14, 7.39) 7.32 (7.20, 7.45) 4.67 (4.59, 4.75)
No infection 29,383 41.9 138,056 19,838 3.94 (3.88, 4.00) 3.98 (3.92, 4.04) 3.67 (3.61, 3.73)
No dementia 744,402 6,953,106 257,446
Infection 237,376 31.9 1,022,965 131,513 4.56 (4.52, 4.60) 4.61 (4.57, 4.65) 2.94 (2.92, 2.97)
No Infection 507,026 68.1 5,930,141 125,933 1 (ref) 1 (ref) 1 (ref)
Men Dementia 42,403 120,646 31,510
Infection (after) 11,959 28.2 19,532 9980 12.51 (12.25, 12.77) 12.63 (12.37, 12.90) 8.29 (8.12, 8.47)
Infection (before) 14,438 34.0 31,817 10,795 8.50 (8.33, 8.67) 8.61 (8.44, 8.79) 4.91 (4.81, 5.01)
No Infection 16,006 37.7 69,297 10,735 4.04 (3.96, 4.12) 4.13 (4.05, 4.22) 3.59 (3.52, 3.67)
No Dementia 639,469 5,431,574 235,277
Infection 214,328 33.5 841,659 121,842 4.81 (4.77, 4.85) 4.91 (4.87, 4.95) 2.91 (2.88, 2.93)
No Infection 425,141 66.5 4,589,915 113,435 1 (ref) 1 (ref) 1 (ref)

Note

  • Bolded MRRs are mainly the focus of this paper.
  • Abbreviations: CI, confidence interval; MRR, mortality rate ratio; N, number; Pyrs, personyears; ref, reference group.
  • a Adjusted for sex, age, and calendar year.
  • b Further adjusted for highest attained educational level and civil status; p ≤ 0.00001 for all MRRs.
  • c Further adjusted for Charlson Comorbidity Index.

Page 415: In Figure 2 ‘MRR 95% CI’ values are incorrect. The revised Figure 2 is given below.

Details are in the caption following the image
Mortality rate ratios by infection site. MRR is presented for each infection site (without other infections) that occurred after a dementia diagnosis relative to the general population without an infection (reference group: no dementia/no infection, MRR = 1), adjusted for sex, age, calendar year, highest attained educational level, civil status, and Charlson Comorbidity Index. Site categories are in ascending order by MRR. Refer to Table S7 for the complete analysis models. CI, confidence interval; MRR, mortality rate ratio; N, number; Pyrs, person-years

Page 415: The first paragraph should be updated and it should read as ‘The synergy index for any infection was 1.383 (95% CI, 1.360–1.507) and was highest for infections in the respiratory system followed by uncategorized infections, sepsis, and surgical infections. A nonsignificant synergy index was seen for infections of the eye, musculoskeletal, and circulatory systems as well as for herpes, hepatitis, and ear infections’.

Page 415: In second paragraph of Discussion section, the index value in the first sentence should be updated and should read as ‘A synergy index of 1.383 shows excess mortality risk in people with both dementia and infections that is beyond the mortality risk from either dementia or infections alone and is beyond the added sum of the two mortality risks’.

Page 416: In the fourth paragraph of Discussion section, the MRR values in the second sentence should be changed and should read as ‘Our study showed that increased mortality was higher in all infection sites, and MRRs ranged from 11.79 in people with dementia and sepsis to 3.98 in those with dementia and ear infections’.

Page 416, 417: MRR Values in Figures 3 and 4 should be updated. Revised figures and its legend are given below.

Details are in the caption following the image
Synergy index for any infection and in all infection sites. The figure presents the calculated synergy index (S) for estimation of the excess mortality between dementia and infections that is beyond the mortality risk from infections or dementia alone and is beyond the added sum of the two mortality risks. S can range from 0 to infinity, where S = 1 indicates no interaction or exact additivity, S > 1 indicates positive interaction or more than additivity, and S < 1 indicates negative interaction or less than additivity. Error bars represent the 95% confidence intervals (CI). Infection sites are ordered as in Figure 2. S was calculated from the fully adjusted mortality rate ratios (MRRs) in the 4 main exposure groups. For any infection, MRR = 7.35 was used to calculate S
Details are in the caption following the image
Mortality rate ratios (MRRs) by time since first infection in women (a) and men (b). Error bars represent the 95% confidence intervals. MRRs presented for groups: dementia/infection (infection after dementia), no dementia/infection, dementia/no infection, and no dementia/no infection (reference group), adjusted for sex, age, calendar year, highest attained educational level, civil status, and Charlson Comorbidity Index. Refer to Tables S8 and S9 for the complete analysis model

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