Ekologiya cheloveka (Human Ecology)Ekologiya cheloveka (Human Ecology)1728-08692949-1444Eco-Vector1720510.17816/humeco17205Research ArticleMATERNAL OCCUPATION AND MARITAL STATUS ARE ASSOCIATED WITH BIRTH WEIGHT AND RISK OF PRETERM BIRTH IN MONCHEGORSK (MURMANSK REGION) DURING A 30-YEAR PERIODKozlovskayaA Vkozlovskaya3@yandex.ruOdlandJ O-GrjibovskiA M-International School of Public Health, Northern State Medical University, Arkhangelsk, Russia Komi Branch of Kirov State Medical AcademyInstitute of Community Medicine, University of TromseNorwegian Institute of Public Health1508201421831223102019Copyright © 2014, Ekologiya cheloveka (Human Ecology)2014We have studied social variations in the average birth weight and prevalence of preterm birth over a 30 year period based on data from the Kola Birth Registry (KBR) in Monchegorsk, we also have investigated associations between birth weight and preterm delivery and maternal occupation. Data on 24,602 infants born live from singleton pregnancies with birth weight above 1,000 grams and their mothers were abstracted inform the KBR. Associations between maternal occupation, marital status and birth weight and preterm birth have been studied. Multiple linear regression was used to quantify influences of independent variables of maternal characteristics on birth weight and preterm births. The multivariable logistic regression was applied to study independent associations between the studied factors and preterm births with and without adjustment to potential confounders. The babies born by the unmarried mothers were on the average 101 g (95% CI: -118, -84) lighter than the babies born by the married women. The women from all other occupations except machine operators, mechanical and trade workers had lighter babies compared to the women from the highest occupational category. The babies of the unmarried mothers were more likely to be born preterm (OR=1.73, 95% CI: 1.37, 2.19). Birth weight and risk of preterm delivery are connected with social factors, such as the mother’s occupation and her marital status, admittedly through the economic component.birth weightpreterm birthmaternal occupation and marital statusKola Birth Registryмасса тела новорожденныхпреждевременные родыпрофессиональная занятость и семейный статус материКольский регистр родов[Вершубская Г.Г., Козлов А.И., Козловская А.В., Шкарабурова Е.Д., Бойко Е.Р. Репродуктивное поведение женщин и размеры тела новорожденных Европейского Севера, Урала и Сибири // Экология человека. 2009. № 4. С. 35-41.][Данишевский К.Д., Кобринский Б.А., Кучеренко В.З. Социальные доминанты беременности и рождаемости в Тульской области. М.: Изд-во общественного здравоохранения и управление здравоохранением, 2003. С. 26.][Гржибовский А.М., Баранов А.А., Теддер Ю.Р. Социально-демографические детерминанты и особенности исходов незапланированной беременности // Экология человека. 2004. № 4. С. 20-24.][Гржибовский А.М., Теддер Ю.Р., Магнус С.П., Бигрен Л.О., Свартбу Б. Оценка частоты неблагоприятных исходов беременности у работающих женщин г. Северодвинска // Экология человека. 2003. № 1. С. 3-6.][Миронов Б.Н. Биологический статус женщин Санкт-Петербурга в 1940-2005 гг. (по антропометрическим данным о новорожденных и их матерях) // Мир России: социология, этнология. 2007. № 1. С. 99-146.][Чащин В.П., Гудков А.Б., Попова О.Н., Одланд Ю.О., Ковшов А.А. Характеристика основных факторов риска нарушений здоровья населения, проживающего на территориях активного природопользования в Арктике // Экология человека. 2014. № 1. С. 3-12.][Ярославцев А.С. Влияние некоторых медико-социальных факторов на репродуктивное здоровье женщин // Проблемы социальной гигиены и история медицины. 1998. № 5. С. 6-9.][Barker D.J.P. Mothers, babies, and health in later life. Edinburgh: Churchill Livingstone, 1998. P. 217.][Danishevski K., Balabanova D., McKee M., Nolte E., Schwalbe N., Vasilieva N. Inequalities in birth outcomes in Russia: evidence from Tula oblast // Paediatr Perinat Epidemiol. 2005. Vol. 19. P. 352-359.][Gissler M., Rahkonen O., Arntzen A., Cnattingius S., Andersen A. M., Hemminki E. Trends in socioeconomic differences in Finnish perinatal health 1991-2006 // J. Epidemiol. Community Health. 2009. Vol. 63. P. 420-425.][Graafmans W.C., Richardus J.H., Borsboom G.J., Bakketeig L., Langhoff-Roos J., Bergsjø P., Macfarlane A., Verloove-Vanhorick S.P., Mackenbach J.P.; EuroNatal working group. Birth weight and perinatal mortality: a comparison of “optimal” birth weight in seven Western European countries // Epidemiology. 2002. Vol. 13. P. 569-574.][Grjibovski A., Bygren L., Svartbo B., Magnus P. Housing conditions, perceived stress, smoking, and alcogol: determinants of fetal growth in Northwest Russia // Acta Obstet Gynecol. Scand. 2004. Vol. 83. P. 1159-1166.][Grjibovski A., Bygren L., Svartbo B., Magnus P. Social variations in fetal growth in a Russian setting: an analysis of medial records // Ann. Epidemiol. 2003. Vol. 13. P. 599-605.][Grjibovski A., Bygren L., Yngle A., Sjöström M. Large social disparities in spontaneous preterm birth rates in transitional Russia // Public Health. 2005. Vol. 119. P. 77-86.][Han K., Huang X.D., Tan H.L., Peng X.S., Chen Q., Zhang J.P., Xiao Z.Y., Chen Y.M., Chen W.Q. Influence of stress from work and negative life events during pregnancy on different types of low birth weight // Zhonghua Liu Xing Bing Xue Za Zhi. 2008. Vol. 29. P. 434-438 [Abstract in English].][Hesse V., Voigt M., Sälzler A., Steinberg S., Friese K., Keller E. et al. Alterations in height, weight, and body mass index of newborns, children, and young adults in eastern Germany after German reunification // J. Pediatr. 2003. Vol. 142. P. 259-262.][International Standard Classification of Occupations by International Labor Organization, ISCO-88. Available from: www.ilo.org/public/English/bureau/stat/isco88/major.htm (accessed 01.12.2008).][Koupilova I., McKee M., Holcik J. Neonatal mortality in the Czech Republic during the transition // Health Policy. 1998. Vol. 46. P. 43-52.][Koupilova I., Rahu K., Rahu M., Karro H., Leon D. Social determinants of birth weight and length of gestation in Estonia during the transition to democracy // Int. J. Epidemiol. 2000. Vol. 29. P. 118-124.][Kozlovskaya A., Bojko E., Ödland J.Ø., Grjibovski A. Secular trends in pregnancy outcomes in 1980-1999 in the Komi Republic, Russia // Int. J. Circumpolar Health. 2007. Vol. 66. P. 437-448.][Kramer M.S. The epidemiology of adverse pregnancy outcomes: an overview // J. Nutr. 2003. Vol. 133 (Suppl 2). P. 1592-1596.][Longo D.R., Kruse R.L., LeFevre M.L., Schramm W.F., Stockbauer J.F., Howell V. An investigation of social class and class differences in very low birth weight outcomes: a continuing public health concern // J. Health Care Finance. 1999. Vol. 25. P. 75-89.][Ödland J.Ø., Chashchin V., Bykov V. Critical evaluation of medical, statistical, and occupational data sources in the Kola Peninsula of Russia pertinent to reproductive health studies // Int. Arch Occup. Environ. Health. 1999. Vol. 72. P. 151-161.][Ödland J.Ø., Nieboer E., Romanova N., Tromassen Y., Brox J., Lund E. Self-reported ethnic status of delivering women, newborn body mass index, blood or urine concentrations of toxic metals, and essential elements in sera of Norwegian and Russian Arctic populations // Int. J. Circumpolar Health. 1999. Vol. 58. P. 4-13.][Onah H.E. Declining fetal growth standards in Enugu, Nigeria // Int. J. Obstet. Gynecol. 2000. Vol. 68. P. 219-224.][Ronda E., Hernández-Mora A., García A.M., Regidor E. Maternal occupation, pregnancy length and low birth weight // Gac. Sanit. 2009. Vol. 23. P. 179-185.][Russian economy. Available from: http://en.rian.ru/analysis/ (accessed 08.02.2008)][Sacks D. Determinants of fetal growth // Curr. Diab. Rep. 2004. Vol. 4. P. 281-287.][Shi L., Green L.H., Kazakova S. Primary care experience and racial disparities in self-reported health status // J. Am. Board Fam. Pract. 2004. Vol. 17. P. 443-452.][Stephansson O., Dickman P., Johansson A., Cnattingius S. The influence of socioecomonic status on stillbirth risk in Sweden // Inter. J. Epidemiol. 2001. Vol. 30. P. 1296-1301.][The confidence interval of a proportion (Wilson procedure). Available from: http://faculty.vassar.edu/lowry/prop1.html (accessed 01.10.20).][Tkachenko E., McKee M., Tsouros A.D. Public health in Russia: the view from inside // Health Policy Plan. 2000. Vol. 15. P. 164-169.][Tretyak A., Godina E., Zadorozhnaya L. Secular trends of sizes at birth in Russian infants born between 1987 and 2002 // J. Physiol. Anthropol. Appl. Human Sci. 2005. Vol. 24. P. 403-406.][Vaktskjold A., Talykova L., Chashchin V., Nieboer E., Оdland J.Ø. The Kola Birth Registry and perinatal mortality in Moncegorsk, Russia // Acta Obstet. Gynecol. Scand. 2004. N 83. P. 58-69.][Vaktskjold A., Talykova L., Chashchin V., Оdland J.Ø., Nieboer E. Small-for-gestational-age newborns of female refinery workers exposed to nickel // Int. J. Occup. Med. Environ. Health. 2007. Vol. 20. P. 327-338.][Villar J., Belizan J. The relative contribution of prematurely and fetal growth retardation to low birth weight in developing and developed countries // Am. J. Obstet. Gynecol. 1982. Vol. 143. P. 793-798.]