Fig. 2From: Associations between serum calcium, 25(OH)D level and bone mineral density in adolescentsThe association between serum 25(OH)D level and total bone mineral density. a Each black point represents a sample. b Solid rad line represents the smooth curve fit between variables. Blue bands represent the 95% of confidence interval from the fit. Adjusted for age, gender, race/ethnicity, income to poverty ratio, education, physical activity, body mass index, calcium supplementation useBack to article page