Table 1. Patient characteristics by mode of detection.
| Mode of detection | Screen detected | Symptomatic | Test for difference |
|---|---|---|---|
| Total numbers | 7737 | 11 674 | |
| Townsend deprivation quintile, N (%) | |||
| Least deprived 1 | 2067 (26.7) | 2975 (25.5) | χ2 for trend=12.32, P=0.002 |
| 2 | 1745 (22.6) | 2553 (21.7) | |
| 3 | 1522 (19.7) | 2315 (19.9) | |
| 4 | 1427 (18.5) | 2210 (19.0) | |
| Most deprived 5 | 969 (12.5) | 1621 (13.9) | |
| Unknown | 7 | 0 | |
| Age at diagnosis | |||
| Mean (s.d.) | 57.2 (4.3) | 56.8 (4.4) | Wilcoxon rank sum Z=−5.02, P<0.001 |
| Median (IQR) | 57 (53–61) | 57 (53–61) | |
| Size of tumour | |||
| Mean (s.d.) | 16.5 (10.9) | 26.1 (18.8) | Wilcoxon rank sum Z=46.65, P<0.0001 |
| Median (IQR) | 15 (10–20) | 20 (15–30) | |
| N, unknown | 690 | 2447 | |
| Nodal status | |||
| Positive | 1722 (27.0) | 4395 (48.1) | Pearson χ2 (1), P<0.001 |
| Negative | 4648 (73.0) | 4735 (51.9) | |
| Not examined/ unknown | 1367 | 2544 | |
| Histological grade | |||
| 1 | 2045 (31.9) | 1099 (12.6) | χ2 (3)=1327, P<0.001 |
| 2 | 3038 (47.4) | 3719 (42.7) | |
| 3 | 1327 (20.7) | 3898 (44.7) | |
| Unknown | 1327 | 2958 | |
| NPI | |||
| Excellent | 1320 (24.7) | 521 (7.7) | χ2 for trend=1600, P<0.001 |
| Good | 1775 (33.3) | 1239 (18.4) | |
| Moderate 1 | 1264 (23.7) | 1744 (25.8) | |
| Moderate 2 | 598 (11.2) | 1657 (24.6) | |
| Poor | 381 (7.1) | 1589 (23.5) | |
| Unknown | 2399 | 4924 | |
Abbreviations: IQR=interquartile range; NPI=Nottingham Prognostic Index.