Table 1.
Patient and treatment characteristics
| Characteristics and treatment | Pathological confirmation (n = 123) | No pathological confirmation (n = 40) | Mann–Whitney P |
|---|---|---|---|
| Age | |||
| Median | 71.8 | 73.4 | NS |
| Range | 54.7–88.2 | 52.0–90.0 | |
| Gender | |||
| Male | 45 (37%) | 17 (43%) | NS |
| Female | 78 (63%) | 23 (58%) | |
| T‐stage | |||
| 1 | 64 (52%) | 35 (88%) | < 0.001 |
| 2 | 43 (35%) | 5 (12%) | |
| 3 | 16 (13%) | 0 (0%) | |
| UICC stage | |||
| Ia1 | 8 (7%) | 8 (20%) | 0.002 |
| Ia2 | 23 (19%) | 17 (43%) | |
| Ia3 | 34 (28%) | 10 (25%) | |
| Ib | 23 (19%) | 3 (8%) | |
| IIa | 19 (15%) | 2 (5%) | |
| IIb | 16 (13%) | 0 (0%) | |
| COPD grade | |||
| 0 | 14 (11%) | 3 (8%) | NS |
| 1 | 10 (8%) | 4 (10%) | |
| 2 | 35 (28%) | 10 (25%) | |
| 3 | 36 (29%) | 11 (28%) | |
| 4 | 22 (18%) | 10 (25%) | |
| Unknown | 6 (5%) | 2 (5%) | |
| Smoking status | |||
| Never | 3 (2%) | 0 (0%) | NS |
| Former | 63 (51%) | 23 (58%) | |
| Current | 47 (38%) | 13 (33%) | |
| Unknown | 10 (8%) | 4 (10%) | |
| Pack years | |||
| Median | 50 | 50 | NS |
| Range | 15–200 | 7–100 | |
| Unknown cases | 33 | 10 | |
| Charlson score | |||
| Median | 4 | 4 | NS |
| Range | 2–14 | 2–8 | |
| Radiotherapy | |||
| DART | 89 (72%) | 19 (48%) | NS |
| STX | 30 (24%) | 18 (45%) | |
| Conventional (=2 Gy/d) | 4 (3%) | 3 (8%) | |
| Chemotherapy | |||
| Yes | 32 (26%) | 0 (0%) | < 0.001 |
| No | 91 (74%) | 40 (100%) | |
COPD, chronic obstructive pulmonary disease; DART, dose‐differentiated accelerated radiotherapy; NS, not significant; STX, stereotactic radiotherapy; UICC, Union for International Cancer Control.