Table 2.

Odds ratios (ORs), adjusted odds ratios (AORs), and 95% confidence intervals (CIs) of sleep from logistic regression on self-reported diagnosis of arthritis National Health and Nutrition Examination Survey, 2009-2012, data.

	Unadjusted Logistic Regression		Adjusted Logistic Regression
	OR [95% CI]	P value	AOR [95% CI]	P value
OVERALL (n = 4,888)
Sleep
2 -5 hours	1.49 [1.18, 1.87]	<.0001	1.35 [1.08, 1.70]	0.0103
6-7 hours	reference		reference
8-9 hours	0.99 [0.82, 1.20]	0.9475	0.90 [0.74, 1.10]	0.3008
10 hours and above	1.75 [1.17, 2.62]	0.0077	1.25 [0.77, 2.04]	0.3515
FEMALE ONLY (n = 2,455)
Sleep
2 -5 hours	1.56 [1.14, 2.13]	0.0190	1.29 [0.94, 1.77]	0.1132
6-7 hours	reference		reference
8-9 hours	1.00 [0.75, 1.32]	0.9796	0.96 [0.70, 1.31]	0.7730
10 hours and above	1.55 [0.88, 2.73]	0.1273	1.14 [0.57, 2.29]	0.7085
MALE ONLY (n = 2,433)
Sleep
2 -5 hours	1.41 [0.98, 2.02]	0.0622	1.40 [0.94, 2.08]	0.0977
6-7 hours	reference		reference
8-9 hours	0.93 [0.72, 1.21]	0.5807	0.84 [0.64, 1.09]	0.1759
10 hours and above	1.95 [1.03, 3.67]	0.0407	1.47 [0.71, 3.01]	0.2870

Hours of sleep were 2 to less than 5.5, 5.5 to less than 7.5, 7.5 to less than 9.5, and 9.5 and above. Adjusted for age (50 years to less than 60, 60 and above), race/ethnicity (non-Hispanic White, non-Hispanic Black, Mexican-American, and other), education (high school graduate or less, more than High School), smoking (current, former, and never), insurance (insured, not insured), self-perception of health (excellent/very good, good, and fair/poor), and body mass index (0 to less than 25, 25 to less than 30, and 30 and above).