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Table 4 Associations between sleep duration and frailty status by logistic regression analysis

From: Associations of sleep quality and sleep duration with frailty and pre-frailty in an elderly population Rugao longevity and ageing study

Sleep duration
(h per 24-h period)
Crude modelModel 1Model 2Model 3
Pre-frail
  ≤ 5(n = 137)0.9 (0.58–1.4)1.04 (0.68–1.6)1.11 (0.74–1.68)1.31 (0.87–1.95)
 5–7 (n = 360)1.29 (0.97–1.73)1.33 (1–1.77)1.3 (1–1.71)1.36 (1.04–1.77)*
 7–8 (n = 712)1111
  ≥ 9 (n = 466)1.82 (1.37–2.42)***1.86 (1.41–2.45)***1.84 (1.41–2.4)***1.96 (1.51–2.53)***
Frail
  ≤ 5(n = 137)2.93 (1.63–5.27)***2.04 (1.09–3.81)*1.95 (1.01–3.77)*1.77 (0.84–3.73)
 5–7 (n = 360)0.78 (0.43–1.39)0.69 (0.38–1.27)0.75 (0.4–1.38)0.64 (0.32–1.27)
 7–8 (n = 712)1111
  ≥ 9 (n = 466)2.98 (1.95–4.56)***2.4 (1.53–3.77)***2.43 (1.51–3.91)***2.55 (1.49–4.35)**
  1. Model1 adjusted for age, and gender on crude model. Model2 adjusted for smoking, drinking, education, marital status, occupation, BMI category, diabetes, hypertension, MCI, perceived overall health plus the variables in Model 1. Model3 further added sleep quality (P PSQI> 5 vs. ≤ 5) to model 2
  2. *P < 0.05, **P < 0.01, ***P < 0.001