Table 3.
Levels of 25 OH Vit-D according to socio-demographic characteristics, habits, and ionized calcium and PTH values.
| Variable | 25 OH Vit-D (ng/mL) |
Total (n = 1339) | |||
|---|---|---|---|---|---|
| <20 (n = 189) | 20-29 (n = 386) | ≥30 (n = 764) | |||
| Sex | Male | 26 (13.8%) | 67 (17.4%) | 98 (12.8%) | 191 (14.3%) |
| Female | 163 (86.2%) | 319 (82.6%) | 666 (87.2%) | 1148 (85.7%) | |
| Age (years) | 18–30 | 20 (10.6%) | 47 (12.2%) | 73 (9.6%) | 140 (10.5%) |
| 31–50 | 44 (23.3%) | 110 (28.5%) | 184 (24.1%) | 338 (25.2%) | |
| 51–70 | 85 (45.0%) | 163 (42.2%) | 361 (47.3%) | 609 (45.5%) | |
| >70 | 40 (21.2%) | 66 (17.1%) | 146 (19.1%) | 252 (18.8%) | |
| SEL | Low | 15 (7.94%) | 35 (9.07%) | 62 (8.12%) | 112 (8.36%) |
| Middle | 125 (66.14%) | 266 (68.91%) | 542 (70.94%) | 933 (69.68%) | |
| High | 49 (25.93%) | 85 (22.02%) | 160 (20.94%) | 294 (21.96%) | |
| BMI (kg/m2) | Low weight | 6 (3.2%) | 3 (0.8%) | 9 (1.2%) | 18 (1.3%) |
| Normal weight | 42 (22.2%) | 108 (28.0%) | 214 (28.0%) | 364 (27.2%) | |
| Overweight | 113 (59.8%) | 217 (56.2%) | 431 (56.4%) | 761 (56.8%) | |
| Obesity | 28 (14.8%) | 58 (15.0%) | 110 (14.4%) | 196 (14.6%) | |
| Sun exposure (minutes/week) | <30 | 169 (89.4%) | 363 (94.0%) | 321 (42.0%) | 853 (63.7%) |
| ≥30 | 20 (10.6%) | 23 (6.0%) | 443 (58.0%) | 486 (36.3%) | |
| Sunscreen use | <3 times/week | 25 (13.23%) | 56 (14.51%) | 682 (89.27%) | 763 (56.98%) |
| ≥3 times/week | 164 (86.77%) | 330 (85.49%) | 82 (10.73%) | 576 (43.02%) | |
| Ionized calcium (mmol/L) | <1.13 | 2 (1.1%) | 12 (0.3%) | 34 (4.5%) | 48 (3.6%) |
| 1.13 a 1.51 | 116 (61.4%) | 361 (15.9%) | 716 (93.7%) | 1193 (89.1%) | |
| >1.51 | 71 (37.6%) | 13 (9.7%) | 14 (1.8%) | 98 (7.3%) | |
| PTH (pg/mL) | <11 | 1 (0.5%) | 2 (0.5%) | 14 (1.8%) | 17 (1.3%) |
| 11 a 67 | 31 (16.4%) | 257 (66.6%) | 643 (84.2%) | 931 (69.5%) | |
| >67 | 157 (83.1%) | 127 (32.9%) | 107 (14.0%) | 391 (29.2%) | |
Abbreviations: SEL: socio-economic level; BMI: body mass index; PTH: parathyroid hormone; Vit-D: vitamin D.