Prevalence of obesity and its risk factors among school children in Karachi, Pakistan.

A cross-sectional questionnaire study was conducted during 2012 in private and public-sector schools of Karachi to determine the prevalence and factors influencing overweight and obesity among school children (aged 11-15 years). Sociodemographic characteristics and dietary habits were explored. The CDC Growth Chart was used to record height and weight. Of a total of 887 children, being overweight and frankly obese was found in 169 (19.1%) and 96 (10.8%), respectively. Of these, 176 (66.4%) were from private schools, and significant associations were found in 202 (76.2%) who were spending > 2 h/day watching television and 139 (52.5%) sleeping > 8 h/day.