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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

From: Knee problems are common in young adults and associated with physical activity and not obesity: the findings of a cross-sectional survey in a university cohort

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)  
  1. Odds ratio (OR) for knee problems adjusted for the other factors in the table. Body mass index (BMI)