Prevalence and factors associated with knee osteoarthritis among middle-aged and elderly individuals in rural Tianjin: a population-based cross-sectional study

Table 6 Multivariate logistic regression of risk factors for knee osteoarthritis in women

Variables	Reference	OR	95% CI	P value
BMI	Normal
Over weight		1.530	1.115–2.099	0.008
Obesity		2.201	1.527–3.172	< 0.001
Sleep situation	Satisfy
Not bad		1.644	1.118–2.275	0.003
Insufficient		1.811	1.221–2.687	0.003
Menopause	No menopause
Yes		4.120	2.116–8.021	< 0.001
Education	Illiterate
Primary level		0.768	0.528–1.118	0.168
Elementary level		0.557	0.371–0.838	0.005
High school		0.724	0.433–1.212	0.219
≥ College		–	–	–
Age	< 55 years
55–64 years		1.677	1.058–2.657	0.028
65–74 years		1.614	0.982–2.653	0.059
≥ 75 years		1.699	0.840–3.439	0.140
Often walk	No
Yes		1.333	1.014–1.753	0.040

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