Objective:To study the components of the metabolic syndrome and its influencing factors among 7-16 years old children and adolescents in Chongqing

in order to provide the evidence for a target precaution. Methods:According to the method of cluster random sampling

4 481 school-age children aged 7 to 16 years old were enrolled from 5 middle schools and primary schools(2 urban schools and 3 rural schools)of Chongqing to measure metabolic index and to fill influencing factors questionnaires. Children were divided into normal group

overweight group and obese group according to body mass index(BMI). The metabolic indices

influencing factors of metabolic syndrome were analyzed by logistic regression analysis

and the differences between boys and girls were compared. Results:(1)Overall overweight incidences among 7-16 years old children and adolescents in Chongqing were 9.8%

12.0% in boys and 7.4% in girls. Overall obesity incidences were 5.4%

7.3% in boys and 3.4% in girls(P<0.05).(2)With increased BMI

the levels of systolic blood pressure

diastolic blood pressure

triglycerides(TG)

cholesterol

low-density lipoprotein cholesterol(LDL-C)

non-high-density lipoprotein cholesterol(nonHDL-C)

waist circumference(WC) were also increased

the level of high- density lipoprotein- cholesterol(HDL- C) was reduced(P<0.05).(3)The overall prevalence of metabolic syndrome was 0.45%. In obese group

children had significantly higher MS prevalence(6.9%)compared with their counterparts in overweight group(0.5%)and normal weight group(0.0%)(P<0.05);the prevalence of MS in boys was higher than that in girls(P<0.05).The detective rates of individual MS component among obese children were:37.9% for high WC

22.7% for high TG

19.7% for low HDL-C

7.4% for high non-HDL-C

4.4% for elevated blood pressure

2.0% for fasting plasma glucose.(4)MS logistic regression analysis demonstrated that WC

meat intake

and family history of hyperlipidemia were risk factors. Boys had higher WC eat more meat than girls(P<0.05). Conclusion:The abnormal components of MS occurred in the overweight and obese children and adoles cents of Chongqing area. High WC

high TG

low HDL-C are the leading three abnormal indices among the obese children in Chongqing

to which we should pay more attention.