Construction of cancer datasets for analysis
| Patients in each cancer dataset, n (%) | |||
|---|---|---|---|
| Breast | Colorectal | Lung | |
| Initial dataset (combined clinical and referral data) | 11 251 (100.0) | 17 390 (100.0) | 17 097 (100.0) |
| Ineligible diagnoses | |||
| In-situ cancers | 1080 (9.6) | 1554 (8.9) | 1213 (7.1) |
| Date of death recorded before diagnosis or on same day | 35 (0.3) | 51 (0.3) | 108 (0.6) |
| Asymptomatic patients | 7066 (62.8) | 8071 (46.4) | 7229 (42.3) |
| Ineligible consultations | |||
| No previous encounter with index GP | 51 (0.5) | 272 (1.6) | 354 (2.1) |
| Index GP sex unknown | 50 (0.4) | 48 (0.3) | 50 (0.3) |
| Patient malea | 14 (0.1) | n/a | n/a |
| Patients included in analysis | 2955 (26.3) | 7394 (42.5) | 8143 (47.6) |
↵a Breast cancer analysis was restricted to female patients only. n/a = not applicable.