5 (0.26) 15.3 15.4 15.6 Female 15.5 (0.28) 15.3 15.4 15.6 Anthropometry this website Height [cm]

Male 174.3 (7.5) 169.7 174.5 179.4 Female 164.8 (6.1) 160.7 164.7 168.6 Weight [kg] Male 63.5 (11.4) 56.0 61.9 69.3 Female 58.8 (10.3) 51.9 57.0 63.9 BMI [kg m-2] Male 20.8 (3.1) 18.8 20.2 22.2 Female 21.6 (3.5) 19.3 21.0 23.2 Fat mass-Total body [kg] GSK621 mw Male 10.8 (7.8) 5.7 8.3 12.9 Female 18.6 (7.9) 13.2 17.1 22.1 Lean mass-Total body [kg] Male 49.8 (6.6) 45.7 49.9 54.1 Female 37.1 (3.9) 34.5 36.8 39.5 pQCT BMDC [mg cm-3] Male 1,074.2 (34.3) 1,053.1 1,077.1 1,099.2 Female 1,124.6 (22.3) 1,111.2 1,126.3 1,139.8 BAC [mm2] Male 329.1 (46.8) 297.1 329.3 359.6 Female 275.1 (36.6) 250.0 273.6 298.7 BMCC [mg] Male 353.8 (53.2) 318.8 353.7 388.3 Female 309.3 (41.0) 281.1 308.0 335.9 PC [mm] Male 76.2 (5.3) 72.8 76.1 79.6 Female 69.5 (4.9) 66.3 69.2 72.6 EC [mm] Male 40.9 (5.9) 37.1 40.4 44.1 Female 37.0 (5.4) 33.6 36.5 39.7 CT [mm] Male 5.63 (0.7) 5.2 5.7 6.1 Female 5.17 (0.6) 4.8 5.2 5.6 Plasma measures 25(OH)D3 [ng ml-1] Male 24.1 (9.0) 18.1 23.0 28.5 Female 22.8 (8.2) 17.1 22.1 27.4 25(OH)D2 [ng ml-1] Male 1.80 (1.9) 0.5 1.2 2.6 Female 1.89 (1.9) 0.5 1.4 2.7 PTH [pmol l-1] Male 4.53 (1.8) 3.2 4.2 5.5 Female 5.11 (2.3) 3.5 4.6 6.1 Table shows descriptive characteristics of anthropometric parametres, 50% tibia pQCT parametres, and plasma measures in males and females learn more at age 15.5 years. Statistics

are presented as means, SDs, medians, and upper and lower quartiles Table 2 Associations between plasma concentration of 25(OH)D2 and 25(OH)D3 and anthropometry variables     Vitamin 25(OH)D2 Vitamin 25(OH)D3 P value (D2D3) Minimally adjusted, N = 3,579 (males=1,709) Minimally adjusted, N = 3,579 (males=1,709) Beta 95% CI P value (sex) Beta 95%

CI P value (sex) Height Male −0.026 (−0.072, 0.021) 0.06 −0.070 (−0.169, 0.026) 0.04 0.42 Female −0.070 (−0.107, -0.028) 0.056 (−0.016, 0.131) 0.01 ALL −0.050 (−0.085, -0.011) 0.000 (−0.061, 0.061) 0.17 Lean mass Male −0.021 (−0.059, 0.017) 0.17 −0.027 (−0.112, 0.060) 0.22 0.90 Female −0.040 Tryptophan synthase (−0.073, -0.017) 0.034 (−0.012, 0.081) 0.01 ALL −0.030 (−0.063, -0.006) 0.007 (−0.040, 0.054) 0.14 Fat mass Male −0.017 (−0.066, 0.031) 0.30 −0.048 (−0.160, 0.066) 0.72 0.61 Female −0.040 (−0.081, -0.001) −0.070 (−0.140, -0.003) 0.44 ALL −0.030 (−0.069, 0.007) −0.060 (−0.124, 0.002) 0.40 Ln PTH Male −0.010 (−0.064, 0.045) 0.55 −0.260 (−0.367, -0.148) 0.65 0.01 Female −0.026 (−0.076, 0.024) −0.290 (−0.392, -0.189) 0.01 ALL −0.019 (−0.064, 0.027) −0.270 (−0.346, -0.200) 0.01 Table shows associations between plasma concentration of 25(OH)D2 and 25(OH)D3 and height, total body lean mass, loge fat mass and loge parathyroid hormone (PTH), adjusted for sex, age at scan and 25(OH)D3 and 25(OH)D2 respectively, in 1709 males and 1870 females at age 15.5 years.