Table 4.

Subgroup analysis of the association of arthritis subtype (RA, OA, and others) and hypertension.

	RA		OA		Other
	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value
Overall	1.25 (1.11–1.41)	<.01	1.32 (1.16–1.5)	<.01	1.09 (0.99–1.21)	.07
Gender
Men	1.07 (0.88–1.31)	.48	1.25 (1.02–1.52)	.03	1.16 (0.99–1.36)	.06
Women	1.39 (1.19–1.62)	<.01	1.37 (1.16–1.62)	<.01	1.06 (0.93–1.2)	.41
Age
20–39 y	1.63 (1.13–2.36)	<.01	1.72 (1.26–2.35)	<.01	1.37 (1.07–1.76)	.01
40–59 y	1.16 (0.96–1.39)	.12	1.56 (1.3–1.87)	<.01	1.24 (1.05–1.46)	.01
≥ 60 y	1.32 (1.13–1.54)	<.01	1.08 (0.92–1.26)	.37	0.9 (0.78–1.04)	.15

RA: rheumatoid arthritis; OA: osteoarthritis.

All data were adjusted for gender (except gender-specific estimates), age (except age-specific estimates), race, health insurance coverage, education level, employment status and poverty to income ratio, physical activity, excess sodium intake, ever cigarette smoking, obesity and diabetes.