TID N = 276

Control N = 100

p Value

Serum 25-hydroxyvitamin D (ng/mL)

24 [19, 32]

31 [25, 37]

<0.001

Deficient (<20 ng/mL)

32%

14%

<0.001

Insufficient (20 - 29 ng/mL)

36%

30%

Sufficient (≥30 ng/mL)

33%

56%