Zahra Hassanzadeh-Rostami - Department of Community Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
Elham Kavosi - Sciences, Shiraz, Iran۲ Vice Chancellor for Health, Shiraz University of Medical Sciences, Shiraz, Iran
Mohammad Reza Heidari - Sciences, Shiraz, Iran۲ Vice Chancellor for Health, Shiraz University of Medical Sciences, Shiraz, Iran
Aliasghar Nasihatkon - Fars Petroleum Industry Health Organization, Shiraz, Iran
Iman Hafizi-Rastani - Fars Petroleum Industry Health Organization, Shiraz, Iran

Background: Adverse birth outcomes are serious health problems that increase morbidity and mortality in neonates. Socioeconomic inequities are linked with Low Birth Weight (LBW) and High Birth Weight (HBW); however, the associations of these factors differ in various groups. The present survey aimed to estimate the prevalence of LBW and HBW and also to determine the associated demographic and socioeconomic factors.Methods: A population-based, cross-sectional survey was conducted on ۶۴۹۵ children, aged ۰-۲ years, selected through cluster and multistage sampling methods in ۳۰ cities of Fars province, Iran, from December ۲۰۱۲ to January ۲۰۱۳. Determinants were assessed using a questionnaires including demographic, health parameters, and socioeconomic variables. Also, birth weights were recorded from health report cards. We examined the association between probable factors related to LBW and HBW, and analyzed the data using multinomial regression model.Results: Among the study population, ۶۳۶ (۹.۷%) were LBW and the rate of HBW was estimated to be ۱۵۲ (۲.۳%). In multinomial regression, the odds ratio of LBW was significantly higher in girls (OR=۱.۳۸, ۹۵%CI=۱.۱۷-۱.۶۳), and the first (OR=۱.۷, ۹۵%CI=۱.۲۵-۲.۳۱) and the second born child (OR=۱.۴, ۹۵%CI=۱.۰۶-۲.۰۲); this ratio was lower in families with the father as the head of the family (OR=۰.۳۱, ۹۵%CI=۰.۱۳-۰.۶۸) or mother (OR=۰.۴۳, ۹۵%CI=۰.۱۱-۱.۶۴), and children from low populated families (OR=۰.۵۴, ۹۵%CI=۰.۴۲-۰.۶۸). Moreover, the lower maternal education (OR=۲.۵۲, ۹۵%CI=۱.۳۶-۴.۷۰) was significantly associated with increased HBW; however, girls (OR=۰.۵۶, ۹۵%CI=۰.۳۹-۰.۷۹), low populated families (OR=۰.۶۰, ۹۵%CI=۰.۳۷-۰.۹۶), and fathers as family head (OR=۰.۱۹, ۹۵%CI=۰.۰۵-۰.۷۱) lowered the odds of HBW. Conclusion: LBW was identified at a relatively high level. The prevention of adverse birth outcomes may be applicable by targeting demographic and social determinants like gender, birth order, family size, mother’s education, and family head as predictors of birth weight in public health interventions.

Birth weight; Infant; Low Birth Weight; Prevalence