Prevalence and secular trends in overweight and obese Taiwanese children and adolescents in 1991-2003

Objective: To describe recent trends in overweight and obese schoolchildren in Taiwan using international cut-off points. Design: Three independent cross-sectional surveys were used. Participants: The study enrolled 157 485 students in 1991, 130 770 students in 1997 and 72 789 students in 2003, all aged 6-18 years, from elementary schools, secondary high schools and senior vocational high schools Results: The prevalence of overweight and obese students increased significantly between 1991 and 2003. During this period, the percentage of male overweight and obese students increased from 5.7% to 14.2% and from 7.9% to 17.4%, respectively. The prevalence of female overweight and obese students increased from 11.1% to 13.4% and from 3.1% to 4.1%, respectively. Covariance analysis indicates that both sexes in 2003 had significantly higher percentages of overweight and obese subjects than those in 1991 and 1997 (p