The prevalence of obesity in school children of Zahedan-Iran; Double burden of weight disorders

Background: Obesity has a permanent effect on childrens' health and acts as a major risk factor for chronic diseases. Therefore considering children BMI is a vital parameter at each visit. Objectives: This study was performed to assess the prevalence of obesity and its determinants in school children of Zahedan in Iran. Zahedan is the capital of Sistan-and-Balouchestan province known to have the highest prevalence of underweight in Iranian children. Patients and Methods: This cross-sectional study was performed on 3582 school children, among which 1786 were girls and 1796 boys in 2012. The students aged 6 to 13 years old and selected based on a stratified random method. The body mass index (BMI) was measured for each student and being overweight/obesity was determined based on CDC 2000 definitions. Prevalence proportions were estimated by weighing the sample. The study was performed at primary and guidance schools of Zahedan. Samples were stratified from two geographic regions of Zahedan (Zone 1 and 2). Results: In the sample, 78.9 were under 85th percentile, 11.8 were overweight (85th - 95th percentile) and 9.3 were obese (> 95th percentile). Weighted estimate for the prevalence of obesity/overweight in girls, boys and all 6 - 13 years old students were 16.2, 18.4 and 17.4, respectively. Presence of overweight/obesity was related to school type (private to public schools OR = 2.13, 1.80 - 2.52) and increasing age (OR = 1.12, 1.04 - 1.20). Conclusions: A high prevalence of obesity was found in Zahedan students. Concurrent high prevalence of obesity/overweight and underweight demonstrates amplitude of weight problems in school children. There is an urgent need for special health programs to conduct proper diagnosis and management of obesity in Zahedan. © 2015, Iranian Society of Pediatrics