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Table 4 Prevalence ratio of factors related to the 7 sub-categories of the PSQIa

From: Factors related with quality on sleep of daytime workers

Variables

PRb (95% CI)

Subjective sleep quality

Sleep latency

Sleep duration

Habitual sleep efficiency

Sleep disturbances

Sleep medication

Daytime dysfunction

Age (in years)

 < 30

1.00

1.00

1.00

1.00

1.00

1.00

1.00

 30–39

0.87 (0.62–1.22)

0.94 (0.65–1.35)

0.90 (0.72–1.14)

0.83 (0.35–1.93)

0.00 (0.00–0.00)

0.20 (0.02–2.24)

0.59 (0.40–0.86)

 40–49

0.51 (0.33–0.81)

0.75 (0.48–1.18)

1.10 (0.85–1.43)

0.69 (0.24–2.02)

0.00 (0.00–0.00)

1.71 (0.30–9.77)

0.28 (0.16–0.51)

50

0.34 (0.17–0.65)

0.92 (0.55–1.53)

1.18 (0.88–1.58)

0.21 (0.03–1.71)

0.00 (0.00–0.00)

0.75 (0.06–8.71)

0.09 (0.03–0.30)

Sex

 Male

1.00

1.00

1.00

1.00

1.00

1.00

1.00

 Female

1.97 (1.37–2.85)

1.57 (1.03–2.40)

1.07 (0.80–1.45)

2.68 (1.13–6.33)

0.00 (0.00–0.00)

1.96 (0.22–17.3)

1.41 (0.87–2.28)

BMI (kg/m2)c

 < 25

1.00

1.00

1.00

1.00

1.00

1.00

1.00

25

1.09 (0.82–1.47)

1.07 (0.80–1.43)

1.14 (0.96–1.36)

1.48 (0.72–3.06)

1.52 (0.49–4.74)

1.16 (0.27–4.94)

0.88 (0.61–1.27)

Musculoskeletal pain

 No

1.00

1.00

1.00

1.00

1.00

1.00

1.00

 Yes

2.16 (1.57–2.98)

1.54 (1.09–2.17)

1.15 (0.93–1.45)

0.79 (0.29–2.13)

9.28 (2.92–29.5)

4.51 (0.95–21.3)

2.09 (1.41–3.10)

  1. aPSQI Pittsburgh Sleep Quality Index
  2. bPR Prevalence Ratio by using Cox regression analysis
  3. cBMI Body Mass Index