Table 4. Predictors of radiographic OA of the knee: results of binomial regression analysis on 170 men and 488 women.

Factor	Prevalence ratio and 95% CI	P-value
Model I
Gender (women)	1.15 (0.71–1.85)	0.565
Age (+5 yr)	1.56 (1.43–1.71)	<0.0001
BMI (+1)	1.14 (1.07–1.23)	0.0001
Pain when squatting (Yes)	2.19 (1.42–3.39)	0.0004
Bony enlargement (Yes)	3.54 (1.57–8.01)	0.002
Crepitus (Yes)	1.81 (1.18–2.79)	0.007
Model II
Gender (women)	1.12 (0.70–1.79)	0.417
Age (+5 yr)	1.54 (1.41–1.69)	<0.0001
BMI (+1)	1.14 (1.06–1.22)	0.0002
Pain when squatting (Yes)	1.41 (1.27–1.57)	<0.0001