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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.