Age < 70 years (N = 333) n (%) | Age ≥ 70 years (N = 188) n (%) | All patients (N = 521) n (%) | |
---|---|---|---|
Histology | |||
Non-squamous cell carcinoma | 283 (85.0) | 161 (85.6) | 444 (85.2) |
Squamous cell carcinomaa | 50 (15.0) | 27 (14.4) | 77 (14.8) |
Disease stage at study entry | |||
Stage IIIa | 18 ( 5.4) | 17 ( 9.0) | 35 ( 6.7) |
Stage IIIb | 65 (19.5) | 38 (20.2) | 103 (19.8) |
Stage IV | 250 (74.1) | 133 (70.7) | 383 (73.5) |
Karnofsky Index (KI) | |||
KI ≥ 80% | 207 (62.2) | 116 (61.7) | 323 (62.0) |
KI 70% | 89 (26.7) | 45 (23.9) | 134 (25.7) |
KI 60% | 27 ( 8.1) | 18 ( 9.6) | 45 ( 8.6) |
KI 50% | 10 ( 3.0) | 8 ( 4.3) | 18 ( 3.5) |
Missing data | 0 ( 0.0) | 1 ( 0.5) | 1 ( 0.2) |