Table 5.
Association of serum vitamin D quartiles with risk of NAFLD in lean and obese participants
| Lean | Models | Odds ratios (95% confidence interval) | χ2 value | P value | |||
| Quartile 1 (n = 327) | Quartile 2 (n = 292) | Quartile 3 (n = 306) | Quartile 4 (n = 319) | ||||
| Model 1 | 0.943 (0.583–1.527) | 1.106 (0.684–1.789) | 1.444 (0.917–2.275) | 1 | 4.100 | 0.251 | |
| Model 2 | 1.248 (0.742–2.099) | 1.334 (0.800–2.225) | 1.557 (0.961–2.522) | 1 | 3.305 | 0.347 | |
| Model 3 | 1.176 (0.673–2.055) | 1.063 (0.609–1.853) | 1.535 (0.916–2.571) | 1 | 3.238 | 0.356 | |
| Obese | Models | Odds ratios (95% confidence interval) | χ2 value | P value | |||
| Quartile 1 (n = 306) | Quartile 2 (n = 343) | Quartile 3 (n = 326) | Quartile 4 (n = 319) | ||||
| Model 1 | 1.621 (1.182–2.224) | 1.852 (1.360–2.521) | 1.358 (0.996–1.852) | 1 | 16.980 | 0.001 | |
| Model 2 | 1.941 (1.368–2.753) | 1.963 (1.404–2.746) | 1.508 (1.080–2.105) | 1 | 19.461 | < 0.001 | |
| Model 3 | 1.973 (1.359–2.865) | 1.964 (1.371–2.815) | 1.420 (0.992–2.033) | 1 | 17.747 | < 0.001 | |
Model 1 was unadjusted
Model 2 was adjusted for age, gender, waist circumference and body mass index
Model 3 was further adjusted for systolic and diastolic blood pressure, alanine aminotransferase, γ-glutamyl transpeptidase, triglyceride, HDL-cholesterol, LDL-cholesterol, fasting blood glucose and serum uric acid
Participants were classified into quartiles according to their serum vitamin D levels: quartile 1, < 45.5 nmol/L; quartile 2, 45.5–59.5 nmol/L; quartile 3, 59.6–74.2 nmol/L; and quartile 4, ≥ 74.3 nmol/L