Table 3. Association between self-reported sleep duration and obesity in the KNHANES 2007–2015.

Variables		Total (n = 41,805)		Men (n = 19,391)		Women (n = 22,414)
		AORa	95% CI	AORa	95% CI	AORa	95% CI
Total, hr
	≤ 5	1.13	1.05–1.23	1.07	0.95–1.22	1.18	1.07–1.32
	6–8	1.00		1.00		1.00
	≥ 9	0.83	0.74–0.93	0.82	0.69–0.96	1.09	0.93–1.27
18–29 yr, hr
	≤ 5	1.13	0.87–1.47	1.11	0.77–1.61	1.20	0.82–1.76
	6–8	1.00		1.00		1.00
	≥ 9	0.77	0.59–0.99	0.76	0.52–1.11	0.97	0.68–1.38
30–49 yr, hr
	≤ 5	1.36	1.18–1.57	1.25	1.02–1.54	1.56	1.29–1.90
	6–8	1.00		1.00		1.00
	≥ 9	0.89	0.73–1.07	0.74	0.54–1.01	1.26	1.00–1.58
50–64 yr, hr
	≤ 5	1.09	0.94–1.25	1.10	0.88–1.37	1.10	0.91–1.32
	6–8	1.00		1.00		1.00
	≥ 9	0.91	0.73–1.14	0.89	0.66–1.20	1.01	0.74–1.38
≥ 65 yr, hr
	≤ 5	0.80	0.70–0.92	0.74	0.60–0.92	0.78	0.65–0.95
	6–8	1.00		1.00		1.00
	≥ 9	0.92	0.74–1.15	1.06	0.79–1.41	0.81	0.58–1.13

KNHANES = Korea National Health and Nutrition Examination Survey, AOR = adjusted odds ratio, CI = confidence interval.

^aAdjusted for education, marital status, household income, alcohol consumption, smoking status, and physical activity.