Associations between OSA and serum vitamin D
| Model 1 | Model 2 | Model 3 | |
| Non-OSA | Reference | Reference | Reference |
| OSA β (95% CI) | −3.21 (−6.17, –0.26) | 1.47 (−1.48, 4.42) | 0.92 (−1.93, 3.76) |
| P value | 0.03 | 0.3297 | 0.5268 |
Model 1: age, sex and race were adjusted.
Model 2:. age, sex, race and body mass index were adjusted.
Model 3: age, sex, race, education level, income to poverty ratio, body mass index, smoking status, alcohol use, diabetes and cardiovascular disease were adjusted.
OSA, obstructive sleep apnoea.