Table 2

Cox proportional hazards model for various potential prognostic factors of patients with stage I disease of adenocarcinoma of the lung

VariableHazard ratio (95% CI)aUnfavorable/favorableP
Age (yr)0.684 (0.320–1.460)>62/≤620.3263
Sex1.435 (0.396–5.194)Male/Female0.5825
Primary tumor (pT)2.982 (1.374–6.475)pT2/pT10.0057
Smoking history1.617 (0.450–5.816)Smoker/never-smoker0.4616
Elevated COX-2 expression2.500 (0.945–6.610)Positive/negative0.0648
  • a CI, confidence interval.