Comparison between body mass index and a body shape index with adiponectin/leptin ratio and markers of glucose metabolism among adolescents.

BACKGROUND: Besides body mass index (BMI), new parameters have been developed to classify individual body shape.

AIM: To investigate the relationship between BMI, waist circumference (WC), a body shape index (ABSI) and ABSI-adolescents among adolescents and verify which would better predict lower adiponectin/leptin (A/L) ratio and disturbances on glucose metabolism.

SUBJECTS AND METHODS: A cross-sectional study with 197 Brazilian adolescents of 14-18 years. Serum leptin, adiponectin, glucose and insulin were measured. A/L ratio, ABSI, ABSI-adolescents, BMI, homeostasis model assessment estimates of insulin resistance (HOMA-IR) and β-cell function (HOMA-β) and the quantitative insulin sensitivity check index (QUICKI) were calculated.

RESULTS: ABSI-adolescents positively correlated with WC (r = 0.83, p < 0.0001) and BMI (r = 0.66, p < 0.0001), but stronger correlations were observed between WC and BMI (r = 0.95, p < 0.0001). ABSI-adolescents, BMI and WC negatively correlated with A/L ratio (all p < 0.0001). The correlation between BMI and A/L ratio was the strongest (r = -0.63, p < 0.001). A/L ratio, BMI, WC and ABSI-adolescents correlated with markers of glucose metabolism (all p < 0.0001) and the strongest correlation was observed with BMI (QUICKI: r = -0.75; HOMA-IR: r = 0.76; HOMA-β: r = 0.77; insulin: r = 0.79). Associations were confirmed by linear regression analysis, adjusted for sex and age.

CONCLUSIONS: ABSI-adolescents, but not ABSI, was related to A/L ratio and to markers of glucose metabolism, but not more strongly than BMI and WC.