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Table 4 Cox regression analyses of prognostic variables for OS in surgery patients

From: Effect of surgery on survival in patients with stage III N2 small cell lung cancer: propensity score matching analysis and nomogram development and validation

Variable Univariate analysis Multivariate analysis
HR (95%CI) p HR (95%CI) p
Age 1.020 (1.000–1.040) 0.036 1.018 (1.000–1.037) 0.046
Race 0.831 (0.496–1.390) 0.484   
Sex 1.040 (0.758–1.420) 0.824   
Year 0.947 (0.690–1.300) 0.739   
Lateral 1.050 (0.946–1.160) 0.365   
Procedure   0.907   
 Sublobectomy 1    
 Lobectomy 0.953 (0.689–1.318) 0.772   
 Pneumonectomy 1.119 (0.483–2.592) 0.794   
Number of examined lymph nodes   0.348   
 ≤ 6 1    
 ≥ 7 1.031 (0.715–1.486) 0.872   
 Unknown 1.335 (0.876–2.034) 0.179   
Number of positive lymph nodes ≥ 3 or unknown vs ≤ 2 1.510 (1.100–2.070) 0.010 1.447 (1.048–1.998) 0.025
T stage   0.022   
 T1 1   1  
 T2 1.406 (0.979–2.021) 0.065 1.325 (0.919–1.910) 0.132
 T3/T4 1.718 (1.154–2.557) 0.008 1.708 (1.135–2.571) 0.010
Radiation 0.640 (0.466–0.879) 0.006 0.684 (0.478–0.981) 0.039
Chemotherapy 0.684 (0.462–1.010) 0.059 0.784 (0.505–1.217) 0.278
  1. OS overall survival, CI confidence interval, HR hazards ratio