The relationship of body mass index and body fat ratio (measured using bioelectric impedans) with lipid levels and metabolic parameters in obese children and adolescents

Purpose: to assess the predictive values of body fat ratio (bfr) in comparison to the body mass index (bmi)- sds and waist-to-hip ratio (whr) in the evaluation of dyslipidemia and metabolic parameters in obese children and adolescents. materials and methods:study included 57 obese and 35 healthy controls. height standard deviation score (hsds), weight standard deviation score (wsds), whr and bmi-sds were calculated. body fat ratio was measured using bioelectrical impedance. blood pressure, plasma fasting glucose, fasting insulin, total cholesterol (tc), triglyceride (tg), high density lipoprotein (hdl), low density lipoprotein (ldl) and homa-ir were evaluated. results:the bmi-sds, whr, bfr, systolic and diastolic blood pressure, tg, tc, ldl, fasting plasma insulin and homa ir was higher in obese group compared to controls (p<0.05). there was no statistically significant difference between the hdl and plasma fasting glucose level of obese and control group (p>0.05). correlation analysis revealed a positive correlation between bmi-sds, bfr, whr and tg, tc, ldl, insulin, and systolic and diastolic blood pressure, while there was no correlation with hdl and glucose. conclusion: there is no superiority of bfr to the bmi and whr in predicting metabolic parameters and dyslipidemia of obese children and adolescents. bmi-sds was found more predictive than whr for dyslpidemia. however, using a combination of bmi and bfr might be much more useful in the evaluation of obesity and related complications including hypertension, cardiovascular and metabolic parameters.