Table 2.

Demographic and clinical correlates of 25-OH vitamin D concentrations^a

Characteristics	Unadjusted percent change in 25-OH vitamin D concentration		Adjusted percent change in 25-OH vitamin D concentration
	βb ± SE	P-value	βb ± SE	P-value
Age (per 10 years)	5.6 ± 2.2	0.01	5.3 ± 1.8	0.003
Female sex	−16.2 ± 6.1	0.003	−11.5 ± 6.1	0.04
Race, non-white	−7.5 ± 7.1	0.26	6.3 ± 6.3	0.30
Low sunshine state	−1.8 ± 8.7	0.83	NA	NA
Summer (versus other season)	33.3 ± 7.3	<0.0001	35.3 ± 5.7	<0.0001
Current smoker	−16.1 ± 9.2	0.05	−12.3 ± 7.8	0.08
College education or more	−2.4 ± 6.2	0.69	NA	NA
Body mass index	−1.1 ± 0.4	0.003	−1.2 ± 0.3	0.0007
Peritoneal dialysis	−15.6 ± 10.3	0.09	−19.6 ± 7.2	0.002
Diabetes	−8.4 ± 6.4	0.16	−4.2 ± 4.8	0.36
Atherosclerotic disease	−1.4 ± 6.1	0.82	NA	NA
Congestive Heart Failure	−8.2 ± 6.5	0.18	NA	NA
Creatinine	1.8 ± 0.9	0.04	0.8 ± 0.5	0.08
Albumin	29.7 ± 6.6	<0.0001	24.9 ± 6.2	0.0003

^aNA, Not applicable.

^bβ coefficient can be interpreted as the percent change expected in 25-OH vitamin D for each unit change in the independent variable.