Risk factor | Recall (open question) | Recognition (prompted list) | ||
N | % | N | % | |
Exposure to radon gas | 0 | 0 | 881 | 59.4 |
Cigarette smoke exposure | 191 | 12.8 | 1271 | 85.6 |
Past cancer treatment | 0 | 0 | 937 | 63.2 |
Close relative with lung cancer | 6 | 0.4 | 875 | 59.0 |
Exposure to chemicals for example asbestos | 243 | 16.4 | 1324 | 89.2 |
Past history of cancer, for example head and neck | 2 | 0.1 | 970 | 65.3 |
Air pollution | 106 | 7.2 | 1114 | 75.1 |
Being a smoker | 1256 | 84.6 | 1387 | 93.5 |
History of lung disease, for example COPD | 6 | 0.4 | 1055 | 71.1 |
COPD, chronic obstructive pulmonary disease.