Table 2.

Estimated adjusted effects (OR with 95% CI) of epidemiologic factors on the prevalence of multiple joints osteoarthritis (OA)

Variable	Spine OA		Shoulder OA		Hand OA		Hip OA		Knee OA
	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value
Female gender	0.7 (0.5–1.0)	0.025	1.9 (0.8–4.4)	0.132	2.3 (1.6–3.1)	< 0.001	0.6 (0.2–2.0)	0.442	5.7 (3.9–8.4)	< 0.001
Age (per 5 years)	1.3 (1.1–1.6)	0.001	1.1 (0.7–1.6)	0.637	1.4 (1.2–1.7)	< 0.001	1.4 (0.9–2.3)	0.185	1.6 (1.4–1.9)	< 0.001
Obesity	1.5 (1.1–2.2)	0.014	1.7 (0.8–3.8)	0.162	1.3 (0.9–1.8)	0.178	1.1 (0.3–3.5)	0.877	3.4 (2.4–5.0)	< 0.001

Statistically significant differences are shown in bold; ORs = odds ratio; CI = confidence interval.