Table 2.
Possible determinants of vitamin D deficiency. Univariate logistic regression analysis
| Univariate – logistic regression |
||
|---|---|---|
| Explanatory variables | OR | P |
| Age, years | 0·98 | 0·003 |
| Sex (men) | 1·1 | 0·6 |
| Ethnicity (African American vs. Caucasian) | 4·7 | < 0·001 |
| Ethnicity (Other vs. Caucasian) | 1·3 | 0·4 |
| Season (summer) | 0·7 | 0·06 |
| BMI, kg/m2 | 1·1 | < 0·001 |
| Systolic blood pressure, mmHg | 1·01 | 0·01 |
| Diastolic blood pressure, mmHg | 1·03 | 0·003 |
| OMA index | 1·1 | 0·01 |
| FEV1/FVC | 2·5 | 0·4 |
| Cholesterol, mg/dL | 1·001 | 0·6 |
| Haemoglobin, g/dL | 0·96 | 0·5 |
| Obesity | 2·3 | < 0·001 |
| Insulin resistance | 1·6 | 0·1 |
| Hypertension | 1·7 | 0·2 |
| Hypercholesterolaemia | 1·4 | 0·1 |
| Airflow limitation (FEV1/FVC < LLN) | 1·1 | 0·7 |
| Anaemia | 0·8 | 0·5 |
| Seconds to perform 6 m walk | 1·1 | 0·5 |
| Baltimore Longitudinal Study of Aging physical activity category | ||
| 0 vs. 1 | 0·5 | 0·03 |
| 0 vs. 2 | 0·3 | < 0·001 |
| 0 vs. 3 | 0·4 | 0·004 |
| Smoking | ||
| Current smoker vs. never smoker | 1·3 | 0·5 |
| Former smoker vs. never smoker | 0·95 | 0·8 |
The values highlighted in bold are statistically significant (P-value < 0.05).
BMI, body mass index; FVC, forced vital capacity.