Table 3. Slow Gait Speed According to the Epworth Sleepiness Scale (ESS) and Insomnia Severity Index (ISI).

		Odds Ratio (95% Confidence Interval)
Sleep Questionnaire	n/N (%)	Unadjusted	Adjusted*
ESS score
<10 (no drowsiness)	126/284 (44.4)	1.00
≥10 (daytime drowsiness)	61/87 (70.1)	2.94 (1.76–4.92)	3.12 (1.72–5.65)†
ISI score
<8 (no insomnia)	112/216 (51.9)	1.00
8–14 (subthreshold insomnia)	57/122 (46.7)	0.81 (0.52–1.27)	0.68 (0.39–1.17)‡
>14 (clinical insomnia)	25/39 (64.1)	1.66 (0.82–3.36)	1.01 (0.42–2.44)‡

^*Based on a logistic regression model adjusted for age, sex, number of chronic conditions, self-reported health status, number of medications, use of a medication with adverse central nervous system (CNS) effects, cognitive impairment (Mini-Mental State Examination score <24), and significant depressive symptoms (Center for Epidemiologic Studies Depression Scale score ≥16).

^†Variables for depressive symptoms and use of a medication with adverse CNS effects were entered into the multivariable model but were highly nonsignificant (P > .50) and were deleted from the reported model.

^‡Variables for number of medications and for use of a medication with CNS adverse effects were entered into the multivariable model but were highly nonsignificant (P > .50) and were deleted from the reported model.