Objective: To investigate the incidence of obesity of urban and rural children in Chongqing areas and to explore the relationship between weight and blood pressure.Methods: Screening was performed in 37785 children aged 7 to 17 years from September 2003 to September 2004 in Chongqing areas.Age

gender

weight

height and blood pressure were ascertained.Results:(1) Overweight and obesity prevalence rates in urban children were 13.16% and 3.73%

respectively

and in rural ones

5.26% and 0.90%

respectively.(2) The prevalence rate of overweight and obesity in male children is 13.16%

and 8.39% in female ones.(3) The prevalence rates of increased systolic and diastolic blood pressure in overweight and obesity children were significantly higher than in normal weight ones.Conclusion: The prevalence rates of overweight and obesity in urban children in Chongqing areas are higher than in rural ones.The prevalence rates of overweight and obesity in male children are higher than in female ones

and the blood pressure increased progressively as the BMI increased.The behavior intervention should be strengthened in overweight and obesity children.