Abstract:Objective:To study the components of the metabolic syndrome and its influencing factors in children and adolescents of Chongqing.Methods:According to the method of stratified cluster sampling,4481 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 fill influencing factors questionnaires.Children were divided into normal group,overweight group and obese group according to body mass index(BMI).To analyse the metabolic indices,influencing factors of metabolic syndrome were analyzed by logistic regression analysis,which differences of them between boys and girls were compared.Results:(1)Overall overweight incidences among children and adolescents in Chongqing were 9.8%,the boys were 12.0%,girls were 7.4%.Overall obesity incidences were 5.4%,the boys were 7.3%,girls were 3.4%(P＜0.05). (2)With increased BMI，The levels of systolic blood pressure(SBP),diastolic blood pressure(DBP), triglycerides(TG), cholesterol(TC), low-density lipoprotein cholesterol(LDL-C), non-high-density lipoprotein cholesterol (non-HDL-C), waist circumference(WC) were also increasing,the level of high-density lipoprotein cholesterol(HDL-C) was reducing(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 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(BP),2.0% for fasting plasma glucose(FPG). (4)Influence factors of MS logistic regression analysis demonstrated that WC,meat intake,family history of hyperlipidemia were risk factors.In boys had higher WC,ate more meat than in girls(P＜0.05).Conclusion:The components of MS abnormal has happened in the overweight and obese children and adolescents of Chongqing area.High WC,high TG,low HDL-C appeared as the leading three abnormal indices among the obese children in Chongqing.We should pay more attention to about that.