Table 1. Baseline characteristics of all patients with stage III and stage IV non-small cell lung cancers
Variables | Stage III (n = 164) | Stage IV (n = 279) | P value |
|---|---|---|---|
Age | |||
 Median (Range) – years | 68.0 (41-88) | 65.0 (32-89) | < 0.01 |
Age distribution | |||
 < 75 – no. (%) | 122 (74.4) | 232 (83.2) | < 0.05 |
 ≥ 75 – no. (%) | 42 (25.6) | 47 (16.8) |  |
Sex – no. (%) | |||
 Male | 137 (83.5) | 205 (73.5) | < 0.05 |
 Female | 27 (16.5) | 74 (26.5) |  |
Histological characteristics of tumor – no. (%) | |||
 Adenocarcinoma | 61 (37.2) | 200 (71.7) | < 0.01 |
 Large cell carcinoma | 3 (1.8) | 4 (1.4) |  |
 Squamous cell carcinoma | 69 (42.1) | 34 (12.2) |  |
 Not otherwise specified | 26 (15.9) | 32 (11.5) |  |
 Other cell types | 5 (3.0) | 9 (3.2) |  |