Characteristics and representativeness of included cases
| Characteristic | Included cases(n = 204) | Excluded(too ill/died)(n = 213) | Refusers(n = 44) |
|---|---|---|---|
| Mean (SD) age | 64.8 (9.6) | 67.8 (9.5) | 67.2 (11.1) |
| Median (IQR) Townsend score of enumeration district of current residence | 1.20(−2.17 to 4.12) | 1.66(2.25 to 4.63) | 3.84(−1.23 to 5.62) |
| Basis of diagnosis (%) | |||
| Clinical diagnosis only | 10.3 | 28.2 | 22.7 |
| Histology/cytology | 89.7 | 72.8 | 77.3 |
| Histological type where known (%) | |||
| Small cell carcinoma | 28.4 | 28.8 | 14.7 |
| Non-small cell carcinoma | 64.5 | 66.0 | 79.4 |
| Other | 7.1 | 5.2 | 5.9 |
| Smoking status before diagnosis (%) | |||
| Current smoker | 59.3 | 67.1 | 58.3 |
| Ex-smoker | 37.8 | 28.7 | 33.3 |
| Never smoker | 3.0 | 4.2 | 8.3 |
| Exposure zone of current residence (%) | |||
| Zone A | 27.0 | 22.6 | 25.0 |
| Zone B | 39.2 | 44.3 | 54.6 |
| Zone C | 33.8 | 33.0 | 20.5 |