Basic characteristics of the individual SNP and the association with serum 25(OH)D concentrations in children, adults and all combined.

Bold numbers represent significant P values.SNP single nucleotide polymorphism (ordered by position), MAF minor allele frequency for the adult population in procent, HWE P-values for Hardy-Weinberg equilibrium in the adult population, M/m major and minor alleles, Gt genotype, Mean, raw serum 25(OH)D concentrations were log-transformed to approximate a normal distribution an given as geometric mean (nmol/L), 95% CI 95%-confident interval.1Unadjusted P values.2Adjusted P values. Linear mixed models with family as a random factor, adjusted for age, sex, BMI, ski and sun holidays, use of solarium, dietary vitamin D intake, use of multivitamin and vitamin D supplementation.