Fig. 2From: Association between serum vitamin D levels and visceral adipose tissue among adolescents: a cross-sectional observational study in NHANES 2011–2015The association between serum Vit D and visceral adipose tissue mass. a Each black point represents a sample. b Solid red line represents the smooth curve fit between variables. Blue lines represent the 95% confidence interval of the slope of the fitting line. Adjusted for age, race, gender, sedentary activity, ratio of family income to poverty, time of detection, BMI, and waist circumferenceBack to article page