Title of article :
Age-Period-Cohort Analysis of Abdominal Obesity in Iranian Children and Adolescents: The CASPIAN Study
Author/Authors :
Hosseini ، Mostafa Department of Epidemiology and Biostatistics - Pediatric Chronic Kidney Disease Research Center, Children’s Hospital Medical Center, School of Public Health - Tehran University of Medical Sciences , Yousefifard ، Mahmoud Physiology Research Center - Iran University of Medical Sciences , Baikpour ، Masoud Department of Neurology - School of Medicine - Tehran University of Medical Sciences , Motlagh ، Mohammad Esmail Department of Pediatrics - Ahvaz Jundishapur University of Medical Sciences , Heshmat ، Ramin Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute - Tehran University of Medical Sciences , Qorbani ، Mostafa Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute - Tehran University of Medical Sciences , Ataei ، Neamatollah Department of Pediatric Nephrology - Pediatric Chronic Kidney Disease Research Center, Children’s Hospital Medical Center, Faculty of Medicine - Tehran University of Medical Sciences , Yaseri ، Mehdi Department of Epidemiology and Biostatistics - School of Public Health - Tehran University of Medical Sciences , Abbasi ، Arash Pediatric Chronic Kidney Disease Research Center, Children’s Hospital Medical Center - Tehran University of Medical Sciences , Kelishadi ، Roya Department of Pediatrics - Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non Communicable Disease - Isfahan University of Medical Sciences
Abstract :
Background: The assessment of the trend of changes in the prevalence of abdominal obesity can provide useful health information. Objectives: This study aimed to conduct an age-period-cohort (APC) analysis to provide the trend of the prevalence of abdominal obesity in the Iranian pediatric population through the three temporal dimensions of age, period, and cohort. Methods: Data were gathered from a total number of 53,962 Iranian children and adolescents aged 5 to 19 years through four surveys of a national surveillance program (the CASPIAN study) conducted in 2003, 2007, 2011, and 2015. Abdominal obesity was defined as a waist-to-height ratio of ≥ 0.5. The APC analysis was performed using the “apc_ie”command in STATA software. Results: A significant correlation existed between age, period, and cohort effects and the prevalence of abdominal obesity in children and adolescents. With increasing age, regardless of considerable fluctuations, the prevalence of abdominal obesity followed an overall increasing trend in both genders. The age effect coefficient increased from -2.1 in the age group of 5 - 9 years to 1.1 in the age group of 10 - 14 years and then decreased to 1.0 in the age group of 15 - 19 years among boys; figures followed an increasing trend in girls from -2.2 to 0.8 and 1.5, respectively. As for the period effect, in both boys and girls, the prevalence of abdominal obesity followed an increasing trend when coming from the earlier periods to the recent ones (from -4.6 to 4.0 in boys and from -4.1 to 2.4 in girls). Likewise, this prevalence increased from earlier birth cohorts to the recent ones in both genders. Conclusions: The prevalence of abdominal obesity is increasing among Iranian children and adolescents and this rising trend is affected by age, period, and birth cohort effects. The findings of this study emphasize the necessity of implementing comprehensive interventions for tackling the epidemic of childhood obesity.
Keywords :
Abdominal Obesity , Children and Adolescents , Prevalence , Age , Period , Cohort Analysis , CASPIAN Study
Journal title :
International Journal of Endocrinology and Metabolism
Journal title :
International Journal of Endocrinology and Metabolism
