Abstract:

Objective To determine the relationship between body fat percent (BF%) and metabolic syndrome (MS) in healthy examinees with different gender,and to
 clarify that BF% was one of the main risk factors to judge MS.Methods 904 persons (554 male and 350 female) for health examination were recruited，the BF%,body mass index (BMI),waist-to-hip ratio (WHR),systolic blood pressure (SBP),diastolic  blood pressure(DBP),fasting blood glucose (FBG), and blood lipid (BL) were compared between male and female;the correlation between  metabolic indexes and BF% in examinees with different gender 
was detected by Spearman correlation analysis;the correlationship between BF% and the risk of MS in examinees with different gender was analyzed
 by Logistic regression;the optimal cut-point  and reliability of BF% in judging MS were calcuated by  receive operating characteristic (ROC) curve  in  the examinees with different gender.Results The levels of SBP,DBP,FBG,BMI,and WHR in the male examinees  were higher than those in the female(
P<0.05).The levels of BF% in the male examinees were  lower than that in the female(P<0.05).The BF% was positively correlated with the levels of  SBP(r=0.27，r=0.41)，DBP(r=0.27，r=0.34),FBG(r=0.18，r=0.37),total cholesterol (TC)(r=0.19，r=0.31),triglycerides (TG)(r=0.42,r=0.47),
low density lipoprotein cholesterol(LDL-C)(r=0.17，r=0.33) and negatively correlated with the level of high density lipoprotein cholesterol (HDL-
C)(r=－0.28，r=－0.30) in both women and men.After adjustment for all  components of MS, BF% was still the independant risk factor of MS  (OR=1.090,95%CI 1.044-1.137).The risk of MS in the men and women with abnormal increasing of BF% was 1.086 (95%CI 1.030-1.144) and 1.107 (95%CI 1.027-1.192) times the people with normal BF%.In ROC analysis on BF% and MS,the areas under ROC  curve were 0.710(95% CI 0.665-0.754) and 0.811(95%CI 0
.749-0.873) in the male and female,respectively. The optimal cut-points of BF% for MS were 29.050% in the male and 38.550% in the different female.
Conclusion BF% is a risk factor and indicator for MS in the people with  gender.

Key words: body fat rate, obese, metabolic syndrome, gender, risk factor