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Table 3 Univariate and multivariate overall survival (OS) analyses for patients with stage I NSCLC

From: Effect of body mass index on survival of patients with stage I non-small cell lung cancer

Variate OS rate (%) Univariate analysis P value Multivariate analysis
3-year 5-year HR (95% CI) P value
Age (years)    0.002 1.83 (1.26–2.64) 0.001
 <60 92.6 ± 1.6 85.6 ± 2.2    
 ≥60 85.8 ± 1.9 77.1 ± 2.4    
Smoking    <0.001 1.45 (1.05–2.10) 0.047
 Never 94.1 ± 1.3 86.4 ± 2.0    
 Current or ever 83.4 ± 2.2 75.1 ± 2.6    
BMI    0.001   0.003
 Underweight 84.0 ± 5.5 75.8 ± 6.7 0.012 2.24 (1.18–4.25) 0.013
 Normal weight 84.2 ± 2.4 75.5 ± 2.9 <0.001 1.58 (1.07–2.33) 0.022
 Overweight 94.8 ± 1.3 87.7 ± 2.0 Reference Reference Reference
 Obese 75.9 ± 7.9 65.3 ± 8.9 0.002 2.87 (1.48–5.59) 0.002
Extent of resection    <0.001 5.01 (2.26–11.07) <0.001
 Lobectomy or bilobectomy 89.6 ± 1.3 81.6 ± 1.6    
 Pneumonectomy 51.3 ± 15.8 41.0 ± 15.6    
Histological differentiation    0.001 0.76 (0.58–0.99) 0.039
 Poor 83.0 ± 2.7 73.5 ± 3.2    
 Moderate 91.5 ± 1.6 84.0 ± 2.2    
 Well 93.2 ± 2.5 86.7 ± 3.5    
T stage    0.005 1.40 (1.08–1.80) 0.011
 T1a 93.8 ± 2.1 90.4 ± 2.7    
 T1b 89.0 ± 3.0 82.0 ± 3.8    
 T2a 87.3 ± 1.8 77.3 ± 2.3    
  1. The data of survival rates are expressed as mean ± standard error
  2. HR hazard ratio, CI confidence interval