Table 1.

Characteristics (Mean ± SD or %) of 145 Enrolled Subjects

Variable	Included subjects (N = 96)	Subjects excluded due to missing 25(OH)D measurement (N = 49)	P
Age (years)	48.3  ±  11.1	43.4  ±  11.5	.014
BMI (kg/m2)	32.7  ±  8.4	32.3  ±  9.6	.797
Dietary Vitamin D intake (IU/d)	125  ±  109	142  ±  126	.431
Total Vitamin D Intake (IU/d)	264  ±  308	223  ±  207	.403
Use Vitamin D supplements	24%	21%	.712
Sun exposure index	18.9  ±  14.2	18.0  ±  13.6	.715
Serum 25(OH)D (nmol/L)	18.5  ±  11.0	–	–
Race			.944
Caucasian	66.7%	59.2%
African American	21.9%	32.7%
Hispanic	4.2%	2.0%
Native American	2.1%	2.0%
Other	5.2%	4.1%