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Table 1 Patient characteristics

From: Adjuvant chemotherapy versus chemoradiotherapy for small cell lung cancer with lymph node metastasis: a retrospective observational study with use of a national database in Japan

  Chemotherapy group Chemoradiotherapy group  
(n = 489) (n = 75) P
Cancer staging
 N factor      0.12
  N1 243 (49.7) 30 (40.0)  
  N2 246 (50.3) 45 (60.0)  
 T factor      0.31
  T0–1 203 (41.5) 37 (49.3)  
  T2 192 (39.3) 21 (28.0)  
  T3–4 90 (18.4) 16 (21.3)  
  Tx 4 (0.8) 1 (1.3)  
Age (years)      0.97
 18–49 24 (4.9) 3 (4.0)  
 50–64 149 (30.5) 22 (29.3)  
 65–74 242 (49.5) 39 (52.0)  
  ≥ 75 74 (15.1) 11 (14.7)  
Sex      0.038
 Male 379 (77.5) 66 (88.0)  
 Female 110 (22.5) 9 (12.0)  
Body mass index (kg/m2)      0.83
  < 18.5 33 (6.8) 7 (9.3)  
 18.5–24.9 325 (66.5) 48 (64.0)  
  ≥ 25 127 (26.0) 19 (25.3)  
 Missing 4 (0.8) 1 (1.3)  
Charlson comorbidity index      0.32
 0–2 316 (64.6) 44 (58.7)  
  ≥ 3 173 (35.4) 31 (41.3)  
Activity of daily life (Barthel index)      0.99
 Independent (100–95) 465 (95.1) 71 (94.5)  
 Dependent (≤90) 12 (2.5) 2 (2.7)  
 Missing 12 (2.5) 2 (2.7)  
  1. Data expressed as number (%) in each group