Table 4. Adjusted ORs (95%CI) of poor sleep quality in relation to the joint effects of positive depression screening and ethnicity among Han and Manchu study participants residing in rural areas of northern China, from 2012 to 2013 ^a.

	Global sleep quality	Subjective sleep quality	Sleep latency	Sleep duration	Habitual sleep efficiency	Sleep disturbance	Use of sleep medication	Daytime dysfunction
	OR(95% CI)	OR(95% CI)	OR(95% CI)	OR(95% CI)	OR(95% CI)	OR(95% CI)	OR(95% CI)	OR(95% CI)
Manchu without depression (REF)	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
Manchu with depression	2.61(2.16–3.17)	2.86(2.10–3.89)	2.75(2.26–3.35)	2.24(1.63–3.08)	1.36(1.07–1.73)	3.80(2.67–5.41)	4.46(2.44–8.12)	2.69(2.13–3.41)
Han without depression	1.44(1.26–1.64)	1.21(0.99–1.55)	1.27(1.10–1.46)	1.28(1.01–1.63)	1.19(1.02–1.39)	1.10(0.81–1.45)	1.15(0.66–1.99)	1.27(1.07–1.52)
Han with depression	4.37(3.76–5.08)	4.38(3.43–5.60)	3.25(2.78–3.80)	1.63(1.24–2.16)	1.49(1.24–1.80)	6.39(4.79–8.52)	8.09(4.92–13.32)	4.07(3.34–4.83)

^a Odds ratios (OR) adjusted for age, sex, smoking, and family income.