Paradoxically high adiponectin and the healthy obese phenotype in obese black and white 16-year-old girls

Abstract

Although adiponectin is correlated inversely with obesity, some obese adults without metabolic complications of obesity have paradoxically high adiponectin. Therefore, we assessed adiponectin risk factor relations in 133 obese 16-year-old school girls from a cohort of 448, focusing on paradoxically high adiponectin-risk in obesity and the healthy obese phenotype. Median adiponectin (11.9 mg/L) in nonobese girls (body mass index [BMI] < 24.6 kg/m²) was selected as a cutpoint to identify high adiponectin in obese girls. Of 90 black and 43 white obese girls (BMI ≥ 24.6), 25 black (28%) and 13 white (30%) girls had paradoxically high adiponectin (>11.9). The 38 obese girls with adiponectin >11.9 versus the 95 obese girls with adiponectin ≤11.9 had higher median high-density lipoprotein (HDL) cholesterol (54 vs 46 mg/dL, P = 0.0007) and apolipoprotein A1 (ApoA1) (181 vs 164 mg/dL, P = 0.011) and had lower insulin (14 vs 20 uU/mL, P = 0.0006). In the 133 obese girls, through stepwise regression, the adiponectin category (>11.9, ≤ 11.9 mg/L) was a significant independent positive determinant of HDL cholesterol (partial r² = 8.4%, P = 0.001), ApoA1 (partial r² = 4.1%, P = 0.025), and it was associated inversely with fasting serum insulin (partial r² = 5.4%, P = 0.0074). By stepwise logistic regression in the 133 obese girls, the adiponectin category (high vs low) was a significant inverse explanatory variable for metabolic syndrome (odds ratio 0.20, 95% confidence intervals 0.04-0.95, P = 0.043). We conclude that paradoxically high adiponectin is associated with the healthy obese phenotype in obese adolescent black and white girls.