Maternal Risk Factors for Preterm Birth in Murmansk County, Russia: A Registry-Based Study
Corresponding Author
Anna A. Usynina
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
International School of Public Health, Northern State Medical University, Arkhangelsk, Russia
Correspondence:
Anna A. Usynina, Northern State Medical University, 51, Troitsky Ave., Arkhangelsk 163000, Russia.
E-mail: [email protected]
Search for more papers by this authorVitaly A. Postoev
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
International School of Public Health, Northern State Medical University, Arkhangelsk, Russia
Search for more papers by this authorAndrej M. Grjibovski
International School of Public Health, Northern State Medical University, Arkhangelsk, Russia
Department of International Public Health, Norwegian Institute of Public Health, Oslo, Norway
Department of Preventive Medicine, International Kazakh-Turkish University, Turkestan, Kazakhstan
North-Eastern Federal University, Yakutsk, Russia
Search for more papers by this authorAlexandra Krettek
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
Department of Biomedicine and Public Health, School of Health and Education, University of Skövde, Skövde, Sweden
Search for more papers by this authorEvert Nieboer
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
Search for more papers by this authorJon Øyvind Odland
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Department of Public Health, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
Search for more papers by this authorErik Eik Anda
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Search for more papers by this authorCorresponding Author
Anna A. Usynina
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
International School of Public Health, Northern State Medical University, Arkhangelsk, Russia
Correspondence:
Anna A. Usynina, Northern State Medical University, 51, Troitsky Ave., Arkhangelsk 163000, Russia.
E-mail: [email protected]
Search for more papers by this authorVitaly A. Postoev
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
International School of Public Health, Northern State Medical University, Arkhangelsk, Russia
Search for more papers by this authorAndrej M. Grjibovski
International School of Public Health, Northern State Medical University, Arkhangelsk, Russia
Department of International Public Health, Norwegian Institute of Public Health, Oslo, Norway
Department of Preventive Medicine, International Kazakh-Turkish University, Turkestan, Kazakhstan
North-Eastern Federal University, Yakutsk, Russia
Search for more papers by this authorAlexandra Krettek
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
Department of Biomedicine and Public Health, School of Health and Education, University of Skövde, Skövde, Sweden
Search for more papers by this authorEvert Nieboer
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
Search for more papers by this authorJon Øyvind Odland
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Department of Public Health, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
Search for more papers by this authorErik Eik Anda
Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
Search for more papers by this authorAbstract
Background
Globally, about 11% of all liveborn infants are preterm. To date, data on prevalence and risk factors of preterm birth (PTB) in Russia are limited. The aims of this study were to estimate the prevalence of PTB in Murmansk County, Northwestern Russia and to investigate associations between PTB and selected maternal factors using the Murmansk County Birth Registry.
Methods
We conducted a registry-based study of 52 806 births (2006–2011). In total, 51 156 births were included in the prevalence analysis, of which 3546 were PTBs. Odds ratios with 95% confidence intervals of moderate-to-late PTB, very PTB and extremely PTB for a range of maternal characteristics were estimated using multinomial logistic regression, adjusting for potential confounders.
Results
The overall prevalence of PTB in Murmansk County was 6.9%. Unmarried status, prior PTBs, spontaneous and induced abortions were strongly associated with PTB at any gestational age. Maternal low educational level increased the risk of extremely and moderate-to-late PTB. Young (<18 years) or older (≥35 years) mothers, graduates of vocational schools, underweight, overweight/obese mothers, and smokers were at higher risk of moderate-to-late PTB. Secondary education, alcohol abuse, diabetes mellitus, or gestational diabetes were strongly associated with moderate-to-late and very PTB.
Conclusions
The observed prevalence of PTB (6.9%) in Murmansk County, Russia was comparable with data on live PTB from European countries. Adverse prior pregnancy outcomes, maternal low educational level, unmarried status, alcohol abuse, and diabetes mellitus or gestational diabetes were the most common risk factors for PTB.
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