Table 3.
Univariate and multivariate logistic regression analysis of the effect of physical activity, BMI and physical inactivity on the prevalence of knee problems adjusting for all other variables
| Characteristic | Univariate | Multivariate | Multivariate |
|---|---|---|---|
| OR (95% CI) | OR (95% CI) | p-value | |
| Age / 5 years | 1.1 (0.9–1.4) | 1.2 (0.9–1.5) | 0.25 |
| Gender | |||
| Male | 1 | 1 | |
| Female | 0.7 (0.5–1.2) | 0.9 (0.5–1.6) | 0.74 |
| Mental distress | |||
| < 1.85 | 1 | 1 | |
| ≥1.85 | 1.9 (1.0–3.5) | 2.3 (1.2–4.6) | 0.017 |
| BMI /10 kg/m2 | 1.5 (0.9–2.7) | 1.8 (1.0–3.4) | 0.063 |
| Physical activity levels | 0.010 | ||
| Low | 1 | 1 | |
| Moderate | 1.4 (0.8–2.5) | 1.9 (1.0–3.5) | |
| High | 2.0 (1.1–3.5) | 2.6 (1.4–4.9) | |
| Average daily sitting time (in hours) | 0.069 | ||
| Linear term | 1.03 (0.93–1.14) | 1.04 (0.93–1.16) | |
| Quadratic term | 1.02 (0.99–1.04) | 1.02 (1.00–1.05) | |
Odds ratio (OR) for knee problems adjusted for the other factors in the table. Body mass index (BMI)