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Table 1 Patient clinicopathologic features and surgical procedures

From: A retrospective comparative analysis of elderly and younger patients undergoing pulmonary resection for stage I non-small cell lung cancer

  Elderly group
(n = 285)
Younger group
(n = 1055)
p
Median age, years (range) 73 (70–86) 58 (20–69) <0.001*
Sex, male, n (%) 201 (70.5) 642 (60.9) 0.003**
Pathologic stage, n (%)    <0.001**
Stage IA 119 (41.7) 527 (59.4)  
Stage IB 166 (58.3) 428 (40.6)  
Histologic subtype, n (%)    <0.001**
Adenocarcinoma 171 (60) 824 (78.1)  
Squamous cell carcinoma 105 (36.8) 211 (20)  
Large cell neuroendocrine carcinoma 9 (3.2) 20 (1.9)  
Extent of resection, n (%)    0.280**
Sublobar resection 23 (8.1) 82 (7.8)  
Lobectomy 250 (87.7) 947 (89.7)  
Bilobectomy 12 (4.2) 26 (2.5)  
Type of operation, n (%)    <0.001**
Video-assisted thoracoscopic surgery 127 (44.6) 656 (62.2)  
Thoracotomy 158 (55.4) 399 (37.8)  
  1. *p value estimated by the Wilcoxon signed-rank test
  2. **p value estimated by Pearson’s chi-square test