Association of sleep duration with risk of all-cause mortality and poor quality of dying in oldest-old people: a community-based longitudinal study

Table 3 Odds ratio for poor quality of dying according to categories of sleep duration

Daily sleep duration	Poor QOD/ total death	Primary analyses, OR (95%CI)		Sensitivity analyses, OR (95%CI)
Daily sleep duration	Poor QOD/ total death	Minimally adjusted ^a	Fully Adjusted ^b	Model 1 ^c	Model 2 ^d	Model 3 ^e
< 7 h (short)	976/2543	1.04 (0.94–1.15)	1.01 (0.91–1.12)	1.02 (0.92–1.13)	1.01 (0.91–1.12)	1.01 (0.91–1.12)
7–9 h (recommended)	1535/4129	1.00 (Reference)	1.00 (Reference)	1.00 (Reference)	1.00 (Reference)	1.00 (Reference)
> 9 h (long)	1605/3972	1.15 (1.05–1.26)	1.10 (1.01–1.21)	1.11 (1.02–1.22)	1.10 (1.01–1.21)	1.10 (1.00–1.21)

OR odds ratio, CI confidence interval
^aBinary logistic models were applied, with adjustment for sex and age at death
^bAdjusted for age at death, sex, region of residence, educational attainment, marital status, primary lifetime occupation, economic condition, regular exercise, current smoking, current drinking, cognitive impairment, functional limitation, depression, cardiovascular disease, stroke, respiratory disease, and cancer
^cFurther included participants who slept less than 3 h or more than 16 h per day
^dFurther adjusted for hypertension, diabetes mellitus, and obesity at baseline
^eUsed cut-off point of 44/45 days for duration of being bedridden to define quality of dying

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