Table 1

Cox regression analysis of various prognostic factors for postoperative survival of lung cancer patients

VariablesHazard ratio (95% CIa)Unfavorable/favorableP
Univariate analysis
 Age (yr)1.70 (0.97–2.99)≥62/<620.063
 Sex1.34 (0.75–2.38)Male/female0.323
 Histology1.30 (0.67–2.52)Squamous/non-squamous0.443
 Smoking history1.42 (0.80–2.51)Smoker/non-smoker0.233
 Disease stage3.89 (2.14–7.08)II-III/I<0.001
let-72.78 (1.56–4.89)Cluster 1/cluster 2<0.001
Multivariate analysis
 Age (yr)1.68 (0.95–2.97)≥62/<620.076
 Sex1.18 (0.44–3.13)Male/female0.741
 Histology1.03 (0.49–2.16)Non-squamous/squamous0.942
 Smoking history1.07 (0.41–2.82)Non-smoker/smoker0.889
 Disease stage3.49 (1.89–6.42)II- III/I<0.001
let-72.17 (1.21–3.89)Cluster 1/cluster 20.009
  • a 95% CI, 95% confidence interval.