Table 2

Risk factors for symptomatic osteoarthritis of the knee in women aged 65 and over—multivariate analysis*

(R)=reference category		Adjusted odds ratio	95% CI	p Value
Risk factor		Adjusted odds ratio	95% CI	p Value
*Matched for age and general practitioner.
BMI when age 36–40: n=104	<25(R)
BMI when age 36–40: n=104	25 or above	36.43	3.07 to 432.75	0.004
Years regularly bending (tertiles)	0–21(R)
	>21–34	12.91	1.00 to 167.16	0.050
	>34	9.80	0.76 to 126.74	0.081
Ever worn 3 inch heels regularly		0.77	0.22 to 2.65	0.673