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Table 3 Men’s lung cancer Hazard Ratios (95% Confidence Interval) according to sleep duration and smoking status

From: Sleep duration and incidence of lung cancer in ageing men

Whole study population

Sleeping hours

≤6.5 h

7-7.5 h

≥8 h

n = 501 (21 cancer)

n = 1066 (24 cancer)

n = 1019 (36 cancer)

 

HR

95% CI

HR

HR

95% CI

Modela

2.06

1.14-3.69

1.0

1.68

1.01-2.83

Modelb

1.95

1.08-3.51

1.0

1.79

1.06-3.02

Modelc

2.12

1.17-3.85

1.0

1.88

1.09-3.22

Modeld

2.01

1.09-3.71

1.0

1.96

1.14-3.38

Modele

2.14

1.17-3.90

1.0

1.80

1.04-3.09

Modelf

1.96

1.07-3.58

1.0

1.82

1.06-3.11

Smokers

n = 194 (18 cancer)

n = 315 (18 cancer)

n = 322 (32 cancer)

Modela

2.01

1.04-3.87

1.0

1.80

1.01-3.21

Modelb

2.04

1.06-3.92

1.0

1.95

1.09-3.49

Modelc

2.23

1.14-4.34

1.0

2.09

1.14-3.81

Modeld

2.21

1.11-4.04

1.0

2.22

1.21-4.09

Modele

2.20

1.12-4.34

1.0

2.02

1.10-3.71

Modelf

2.15

1.09-4.22

1.0

2.04

1.12-3.74

  1. Modela: Adjusted for age and examination years.
  2. Modelb: Adjusted for age, examination years and cumulative smoking history (pack-years).
  3. Modelc : Adjusted for age, examination years, cumulative smoking history (pack-years), family cancer history and Human Population Laboratory depression scale scores.
  4. Modeld: Modelc further adjusted for: Alcohol consumption (g/wk), physical activity (kcal/day) and body mass index (kg/m2).
  5. Modele: Modelc further adjusted for: Marital status, education years, night work, and employment status.
  6. Modelf: Modelc further adjusted for: Asthma and chronic bronchitis.