Demographic and anthropometry profiles according to serum 25(OH)D quintiles
| Variables | First quintile(3.0–21.5, n, 160) | Second quintile(21.51–35.60, n, 178) | Third quintile(35.61–46.50, n, 172) | Fourth quintile(46.51–62.30, n, 130) | Fifth quintile (>62.31, n, 157) | P values |
| Age (years) | 44.3±10.7 | 42.8±11.3 | 41.9±11.4 | 39.2±12.3 | 41.2±10.7 | 0.0027 |
| Pulse rate (per minute) | 84.2±5.0 | 83.4±5.2 | 82.9±5.5 | 84.2±4.6 | 84.0±5.1 | 0.11 |
| Family medical history (n, %) | ||||||
| Obesity | 0 | 2 (1.12) | 4 (2.33) | 2 (1.54) | 2 (1.27) | 0.44 |
| Diabetes | 32 (21.6) | 39 (26.3) | 23 (15.5) | 26 (17.5) | 28 (18.9) | 0.03 |
| Blood pressure (mm Hg) | ||||||
| Systolic | 123.6±12.6 | 123.2±14.0 | 120.9±10.4 | 122.8±12.3 | 122.8±13.8 | 0.33 |
| Diastolic | 80.7±7.4 | 81.4±8.2 | 80.2±7.8 | 80.1±7.9 | 80±8.1 | 0.47 |
| Weight and BMI | ||||||
| Weight (kg) | 65.2±19.0 | 62.3±13.0 | 63.1±14.2 | 64.1±12.6 | 63.5±14.5 | 0.23 |
| Height (cm) | 152.3±6.2 | 153.2±6.4 | 154.2±5.2 | 152.6±5.4 | 153.8±5.1 | 0.45 |
| BMI (kg/m²) | 26.7±5.9 | 26.1±5.1 | 26.4±4.9 | 26.1±4.8 | 26.2±5.1 | 0.86 |
Results are shown as mean±SD and n, %. Analysis of covariance (ANCOVA) test was applied. Serum 25(OH)D levels were categorized in quintiles as described in text. P<0.05 is statistically significant.
25(OH)D, 25-hydroxy vitamin D; BMI, body mass index.