Table 4 Logistic regression models predicting 25OHD deficiency in African-Americans, n = 1162

SLE

1.0

-

RA

1.22 (0.45, 3.27)

0.695

T2DM

2.4 (1.2, 4.7)

0.014

Age, for every decade

0.81 (0.74, 0.89)

<0.001

Male gender

1.1 (0.79, 1.5)

0.608

October - March season

1.4 (1.1, 1.8)

0.013

Serum calcium, mg/dl

0.76 (0.64, 0.89)

0.001

Vitamin D supplementation

0.84 (0.62, 1.12)

0.23

Bisphosphonate therapy

0.55 (0.33, 1.12)

0.02

Serum creatinine >1.5 mg/dl

1.6 (1.16, 2.2)

0.004