Prevalence and correlates of vitamin D status in African American men

BMC Public Health

Table 2 Multivariate adjusted betas and odds ratios (OR) with 95% confidence intervals (CI) for 25(OH)D ≥ 15 ng/mL.

	Multivariate¹ model (N = 194)		Multivariate model + physical activity² (N = 136)
	Beta³ (p-value)	OR (95% CI)	Beta³ (p-value)	OR (95% CI)
Supplemental vitamin D (IU/day)
0	ref	1.0	ref	1.0
≤400	4.5 (<0.0001)	5.9 (2.6, 13.5)	4.3 (<0.0001)	8.1 (2.9, 22.6)
>400	4.5 (<0.0001)	4.3 (1.5, 12.4)	4.5 (0.001)	4.8 (1.3, 18.6)
Milk intake (times/week)
<1 time/week	ref	1.0	ref	1.0
1–<3.5 times/week	1.4 (0.07)	2.3 (1.0, 5.2)	1.7 (0.08)	2.8 (1.0, 7.5)
≥3.5 times/week	3.3 (0.001)	5.9 (2.2, 16.0)	3.1 (0.01)	6.6 (1.9, 23.6)
Season of blood collection (%)
Summer	ref	1.0	ref	1.0
Fall	-4.70 (<0.0001)	0.2 (0.1, 0.5)	-4.34 (0.0004)	0.2 (0.1, 0.7)
Winter	-8.59 (<0.0001)	0.05 (0.02, 0.1)	-8.56 (<0.0001)	0.04 (0.01, 0.2)
Spring	-6.22 (<0.0001)	0.1 (0.03, 0.2)	-5.69 (<0.0001)	0.1 (0.03, 0.4)
Recreational physical activity (hours/week)	--	--	0.38 (0.07)	1.3 (1.1, 1.6)
R²	0.40		0.39

¹ Model including supplemental vitamin D, milk intake, and season of blood collection.
² Model including supplemental vitamin D, milk intake, season of blood collection, and recreational physical activity.
³ Betas represent absolute mean change in 25(OH)D concentration relative to referent category. For physical activity, beta represents absolute mean change in 25(OH)D concentration for each one-hour increase in recreational physical activity per week.

ISSN: 1471-2458