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

  ≤ 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)

1

1

1

1

  ≥ 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)***

  ≤ 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)

1

1

1

1

  ≥ 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)**