Table 1. Comparison of Characteristics Between Cases ( n = 80) and Controls ( n = 80) .
| Parameter | Case Mean ± SD |
Control Mean ± SD |
p
value
(Unpaired t -test) |
|---|---|---|---|
| Age (years old) | 38.30 ± 10.92 | 36.40 ± 10.61 | 0.27 |
| Gender (Male:Female) | 48:32 | 47:33 | − |
| Weekly vitamin D intake IU ∗ | 19.24 ± 3.56 | 19.15 ± 3.65 | 0.88 |
| Weekly Sunlight exposure (hours) | 8.64 ± 2.46 | 9.45 ± 3.01 | 0.06 |
| Calcium (mg/dl) | 10.12 ± 0.41 | 10.56 ± 0.48 | 0.0001 |
| Phosphorus (mg/dl) | 3.97 ± 0.22 | 4.02 ± 0.25 | 0.53 |
| Alkaline phosphate (IU/L) | 190.00 ± 17.20 | 194.40 ± 16.30 | 0.41 |
∗
IU, International unit. 1 IU = 0.025 micro gram.