Table 3.
Vitamin D status in different subgroups in both cases and controls.
| Item | Mean of serum vitamin D ± SD (control) |
P value (within case groups) |
Mean of serum vitamin D ± SD (case) |
P value (within control groups) |
P value (between case and control groups) |
|---|---|---|---|---|---|
| Sex | |||||
| Female | 11.84 ± 1.34 | 0.019 | 12.52 ± 1.13 | 0.046 | 0.702 |
| Male | 18.91 ± 2.19 | 16.82 ± 1.15 | 0.381 | ||
| Residency | |||||
| Rural | 14.97 ± 2.04 | 0.159 | 15.12 ± 1.19 | 0.084 | 0.949 |
| Urban | 11.60 ± 1.30 | 11.94 ± 1.37 | 0.857 | ||
| Level of education | |||||
| Below high school diploma | 13.00 ± 1.68 | 0.895 | 13.08 ± 1.26 | 0.672 | 0.967 |
| Above high school diploma | 13.32 ± 1.64 | 13.88 ± 1.29 | 0.793 | ||
| Duration of sun exposure | |||||
| 0–120 min/day | 10.67 ± 0.81 | 0.000 | 12.20 ± 1.01 | 0.004 | 0.238 |
| ≥120 min/day | 24.53 ± 4.74 | 18.60 ± 1.81 | 0.234 | ||
| Group age | |||||
| ≤25 | 13.21 ± 1.88 | 0.993 | 12.21 ± 1.95 | 0.457 | 0.722 |
| >25 | 13.18 ± 1.49 | 13.90 ± 1.04 | 0.693 | ||
| ≤50 | 12.85 ± 1.21 | 0.307 | 13.24 ± 0.95 | 0.243 | 0.803 |
| >50 | 17.56 ± 5.56 | 17.30 ± 3.26 | 0.968 |
The Mann-Whitney test was used to compare mean of vitamin D in different groups.