Table 1 Clinicopathological characteristics of the study cohort. In total, 104 individuals undergoing surgical resection for SCLC were included in this study
|  | Total (n = 104) |
|---|---|
Age (years, median, range) | 64 (41–83) |
 < 65 | 56 (54%) |
 ≥ 65 | 47 (45%) |
 N/A | 1 (1%) |
Gender | |
 Female | 49 (47%) |
 Male | 54 (52%) |
 N/A | 1 (1%) |
Smoking status | |
 Non-smoker | 12 (11.5%) |
 Former or current smoker | 87 (83.7%) |
 N/A | 5 (4.8%) |
Most common comorbidities | |
 Hypertension | 53 (50.9%) |
 Chronic obstructive pulmonary disease (COPD) | 43 (41.3%) |
 Diabetes mellitus | 17 (16.3%) |
Surgery type | |
 Wedge resection | 12 (11.5%) |
 Segmentectomy | 14 (13.5%) |
 Lobectomy | 53 (50.9%) |
 Pneumonectomy | 11 (10.6%) |
 Unspecified | 14 (13.5%) |
Pathologic stage | |
 I | 39 (37.5%) |
 II | 18 (17.3%) |
  ≥ III | 31 (29.8%) |
 N/A | 16 (15.4%) |
Lymph node status | |
 N0 | 44 (42.3%) |
 N1 | 23 (22.1%) |
 N2 | 17 (16.3%) |
 N/A | 20 (19.2%) |
Tumor size | |
 T1 | 42 (40.4%) |
 T2 | 22 (21.2%) |
 T3 | 11 (10.6%) |
 T4 | 12 (11.5%) |
 N/A | 17 (16.3%) |
Adjuvant therapy (chemotherapy and/or irradiation) | |
 Yes | 63 (60.6%) |
 No | 24 (23.1%) |
 N/A | 17 (16.3%) |
Eastern Cooperative Oncology Group (ECOG) Performance Status 0–1 | 104 (100%) |