. Author manuscript; available in PMC: 2020 Dec 1.

Published in final edited form as: J Intern Med. 2019 Jul 29;286(6):651–659. doi: 10.1111/joim.12950

Table 1.

Baseline characteristics

	Older women		Younger women

	Caucasian (n=140)	African American (n=88)	Caucasian (n=91)	African American (n=39)
Age (years)	66.9 (7.4)	66.7 (7.4)	38.3 (5.1)	35.4 (6.3)^**
BMI (kg/m²)	30.5 (6.0)	32.6 (7.3) ^{^^}	29.0 (6.2)	31.4 (5.8)^*
Serum 25 OHD (nmol/L)	50.9 (13.2)	47.5 (14.1) ^{^}	55.7 (13.8)	35.8 (10.3)^**
Free 25OHD (nmol/L)	9.21 (2.88)	8.81 (3.20)	11.82 (3.32)	9.24 (2.90)^*
%Free 25D/total 25OHD	0.019 (0.004)	0.018 (0.005)	0.021 (0.004)	0.025 (0.005)^**
Serum 1,25 (OH)2D (nmol/L)	109.0 (36.9)	105.9 (32.0)	113.9 (40.7)	131.4 (47.1)^*
Serum PTH (pg/ml)	36.9 (13.6)	43.8 (20.3) ^{^^}	33.5 (10.3)	43.2 (17.1)^**
Dietary vitamin D intake (IU/day)	118.7 (76.9)	113.4 (89.0)	109.8 (68.5)	95.7 (79.8)
Dietary calcium intake (mg/day)	694.0 (225.8)	555.9 (226.4)^{^^}	789.0 (265.1)	502.4 (164.8)^**

Table contains Means (Standard Deviations)

Dietary vitamin D intake only available for Omaha site

^{^}

p<0.05

^{^^}

p<0.001 comparing by race in older women

p<0.05

^**

p<0.001 comparing by race in younger women