Variables | Â | Vitamin D (ng/mL) Mean (S.D)b | Vitamin D | Â | ||||
---|---|---|---|---|---|---|---|---|
 | ≥10 ng/mL | <10 ng/mL | p-valuea | |||||
 | N | % | N | % |  | |||
Total | Â | 9.07 | 3.25 | 333 | (31.6) | 721 | (68.4) | Â |
Age (years) | <30 | 8.86 | 3.12 | 220 | (28.8) | 545 | (71.2) | 0.001 |
 | ≥30 | 9.61 | 3.54 | 113 | (39.1) | 176 | (60.9) |  |
Shift work | Yes | 8.89 | 3.23 | 253 | (29.0) | 619 | (71.0) | <0.001 |
 | No | 9.94 | 3.25 | 80 | (44.0) | 102 | (56.0) |  |
Regular exercise (times per week) | ≥3 | 9.09 | 4.12 | 47 | (31.8) | 101 | (68.2) | 0.963 |
<3 | 9.06 | 3.09 | 286 | (31.6) | 620 | (68.4) | Â | |
Smoking habit | Current | 8.81 | 3.21 | 47 | (25.7) | 136 | (74.3) | 0.058 |
 | Never/former | 9.12 | 3.26 | 286 | (32.8) | 585 | (67.2) |  |
Risky drinkingc | Yes | 9.56 | 3.25 | 63 | (38.0) | 103 | (62.0) | 0.055 |
 | No | 8.97 | 3.25 | 270 | (30.4) | 618 | (69.6) |  |
Body Mass Index (kg/m2) | <18.5 | 8.32 | 2.94 | 34 | (24.5) | 105 | (75.5) | 0.125 |
18.5–24.9 | 9.15 | 3.34 | 238 | (32.6) | 493 | (67.4) |  | |
 | >25 | 9.31 | 3.07 | 61 | (33.2) | 123 | (66.8) |  |