Table 1.
DCIS and invasive cancer detection frequency, and subsequent invasive interval cancer frequency by year of screening
| Total number screened | DCIS cases detected at screening | Screen-detected DCIS cases per 1000 women screened (unit range) | Screen-detected DCIS cases with grading information (%) | High grade screen-detected DCIS | Invasive cases detected at screening | Invasive screen-detected cases per 1000 women screened (unit range) | Invasive interval cancers | Invasive interval cancers per 1000 women screened (unit range) | |
|---|---|---|---|---|---|---|---|---|---|
| 2003–04 | 1 279 007 | 2003 | 1·57 (0·73–2·85) | 1671 (83%) | 997 | 6952 | 5·44 (0–7·61) | 3789 | 2·96 (1·00–4·96) |
| 2004–05 | 1 286 244 | 2033 | 1·58 (0·67–3·56) | 1708 (84%) | 1036 | 7194 | 5·59 (3·74–7·99) | 3688 | 2·87 (0·74–4·05) |
| 2005–06 | 1 340 046 | 2144 | 1·60 (0·54–2·85) | 1842 (86%) | 1119 | 7504 | 5·60 (3·85–7·64) | 4000 | 2·98 (1·27–5·60) |
| 2006–07 | 1 338 361 | 2205 | 1·65 (0·59–3·22) | 1956 (89%) | 1213 | 7364 | 5·50 (3·77–7·77) | 3737 | 2·79 (1·25–4·61) |
DCIS=ductal carcinoma in situ.