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Year : 2017  |  Volume : 22  |  Issue : 1  |  Page : 107

Comprehensive maternal characteristics associated with birth weight: Bayesian modeling in a prospective cohort study from Iran

1 Department of Biostatistics and Epidemiology, Health School, Isfahan University of Medical Sciences, Isfahan, Iran
2 Department of Mathematical Sciences, Isfahan University of Technology, Isfahan, Iran
3 Department of Biomedical Engineering, Engineering Faculty, The University of Isfahan, Isfahan, Iran
4 Department of Midwifery, School of Nursing and Midwifery, Isfahan University of Medical Sciences, Isfahan, Iran
5 Department of Midwifery, School of Nursing and Midwifery, Arak University of Medical Sciences, Arak, Iran

Correspondence Address:
Sajedeh Molavi
Kaveh Street, Negarestan Avenue, Dadgostar Alley, Postal Code 8196784873, Isfahan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jrms.JRMS_926_16

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Background: In this study, we aimed to determine comprehensive maternal characteristics associated with birth weight using Bayesian modeling. Materials and Methods: A total of 526 participants were included in this prospective study. Nutritional status, supplement consumption during the pregnancy, demographic and socioeconomic characteristics, anthropometric measures, physical activity, and pregnancy outcomes were considered as effective variables on the birth weight. Bayesian approach of complex statistical models using Markov chain Monte Carlo approach was used for modeling the data considering the real distribution of the response variable. Results: There was strong positive correlation between infant birth weight and the maternal intake of Vitamin C, folic acid, Vitamin B3, Vitamin A, selenium, calcium, iron, phosphorus, potassium, magnesium as micronutrients, and fiber and protein as macronutrients based on the 95% high posterior density regions for parameters in the Bayesian model. None of the maternal characteristics had statistical association with birth weight. Conclusion: Higher maternal macro- and micro-nutrient intake during pregnancy was associated with a lower risk of delivering low birth weight infants. These findings support recommendations to expand intake of nutrients during pregnancy to high level.

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