Risk factor | Recalled | Recognised | ||
N | % 95% CI | N | % 95% CI | |
Smoking | 386 | 95.8 93.3 - 97.5 | 399 | 99 97.5 - 99.7 |
Second-hand smoking | 68 | 16.9 13.3 - 20.9 | 383 | 95 92.4 - 96.9 |
Air pollution | 99 | 24.6 20.4 - 29.1 | 321 | 79.7 75.4 - 83.5 |
Other lung diseases | 15 | 3.7 2.1 - 6.1 | 242 | 60.0 55.1 - 64.5 |
Previous lung cancer or family history of lung cancer | 126 | 31.3 26.8 - 36.0 | 349 | 86.6 82.9 - 89.8 |
Chemicals | 27 | 6.7 4.5 - 9.6 | 293 | 72.7 68.1 - 77.0 |
Asbestos | 24 | 6.0 3.9 - 8.7 | 280 | 69.5 64.7 - 73.9 |
Radiation | 18 | 4.5 2.7 - 7.0 | 259 | 64.3 59.4 - 69.0 |