Multivariate ordinal logistic regression analyses of categories of serum 25OHD levels
| OR | 95% CI | p Value | |
| Age | 1.22 | 1.13 to 1.31 | <0.0001 |
| Sex | |||
| Male | Reference | 0.0002 | |
| Female | 1.68 | 1.28 to 2.21 | |
| Region of residence | |||
| Urban | 1.32 | 0.96 to 1.81 | 0.0890 |
| Rural | Reference | ||
| BMI | 1.07 | 1.03 to 1.12 | 0.0011 |
| Smoking | |||
| Active | 0.89 | 0.54 to 1.47 | 0.6539 |
| Passive | 1.01 | 0.74 to 1.37 | 0.9535 |
| No | Reference | ||
| Season | |||
| April–October | Reference | ||
| November–March | 4.49 | 3.25 to 6.22 | <0.0001 |
Data are presented OR (95% CI).
Statistics were carried out using logistic regression.
Serum 25OHD levels were categorised into three ordinal categories of vitamin D status (<20: deficiency, ≥20 to <30: insufficiency, 30≥: sufficiency).
Model: adjusted for age, sex, region, BMI, smoking, season.
25OHD, 25-hydroxyvitamin D; BMI, body mass index.