Study of the relationship between waist-to-hip ratio, body mass index and prevalence of metabolic syndrome in the occupational population in Shanghai Free Trade Zone.

Objective To explore the relationship between waist-to-hip ratio(WHR),body mass index(BMI) and prevalence of metabolic syndrome(MS) in occupational population in Shanghai Free Trade Zone.Methods 668 employees in Shanghai Free Trade Zone companies who took physical examination from January 2007 to December 2008 were collected,and they were divided into 5 groups according to their BMI and WHR,and investigated on epidemiological characteristics.Results The rates of abnormal BMI and WHR were 49.1% and 53.0%,respectively,the standardized rates were 40.30% and 54.75%,respectively.The prevalence of obesity was increasing along with the age.The prevalence rates of hypertension,hyperglycemia,dyslipidemia,MS and combined with two metabolic disorders in B group with abnormal WHR and in D group with abnormal BMI WHR were significantly higher than that in A group with normal BMI and WHR(P 0.05),while there was significant difference between C group with abnormal BMI and A group only in the prevalence of hypertension and MS(P0.05).The risk of MS in B group,C group,D group was all significant higher than that in A group with OR value as 11.581(95%CI: 1.277~ 105.044),16.600(95%CI: 1.822~151.224),83.000(95%CI: 11.419~603.289),respectively.Conclusion BMI abnormality and WHR abnormality independently contribute to MS.In combined analysis of WHR and BMI,both variables were significant predictors of metabolic disorders;WHR is a stronger risk factor on metabolic disorders compared with BMI.The specificity and sensitivity of diagnosing MS would be significantly higher by using both WHR and BMI.They should be controlled for early preventing and controlling MS.