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Table 3 Relative risks (95% confidence interval) for the association between sleep duration and sleep complaints on the incidence of frailty

From: Sleep duration and incident frailty: The Rural Frailty Study

 

Model 1

Model 2

Model 3

RR

(95% CI)

RR

(95% CI)

RR

(95% CI)

Sleep duration (%)

 5 h or less

2.10*

(1.27–3.47)

1.78†

(1.04–3.06)

1.80†

(1.04–3.11)

 6 h

1.10

(0.56–2.18)

1.03

(0.53–1.99)

0.99

(0.51–1.92)

 7–8 h (reference)

1.00

 

1.00

 

1.00

 

 9 h or more

1.77†

(1.15–2.73)

1.66†

(1.07–2.56)

1.69†

(1.10–2.58)

Sleep complaints (reference: no)

1.40‡

(0.96–2.04)

1.42‡

(0.94–2.15)

1.41

(0.94–2.12)

  1. Model 1: Unadjusted Poisson regression
  2. Model 2: As Model 1 and additionally adjusted for sex (men, women), age (years), ethnicity background (yes, no), literacy (yes, no), paid job (yes, no), With partner (yes, no)
  3. Model 3: As Model 2 and additionally adjusted for: subjective memory complaint (yes, no), limitations in ADL (yes, no), limitations in IADL (yes, no), SPPB (score ≥ 8, < 8), number of medications and presence of hypertension, diabetes, hypercholesterolemia, coronary heart disease, stroke, arthritis, and osteoporosis
  4. * P < 0.01, † P < 0.05, ‡ P < 0.1