Table 2.
Percentages of early and advanced disease in each detection cohort, reported by definition of advanced-stage breast cancer.
| Screen-detected | Interval | Non-screened | Total | p value* | ||||
|---|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | N | ||
| TNM stage | ||||||||
| Early stage (St 0–I–II) | 44,368 | 95.1 | 13,953 | 80.6 | 18,578 | 77.2 | 76,899 | <0.001 |
| Advanced stage (St III–IV) | 2272 | 4.9 | 3353 | 19.4 | 5491 | 22.8 | 11,116 | |
| Unknown | 94 | 56 | 120 | 270 | ||||
| NM stage | ||||||||
| Early stage (N0M0) | 35,391 | 78.8 | 9012 | 59.0 | 12,886 | 60.9 | 57,289 | <0.001 |
| Advanced stage (N+ and/or M+) | 9514 | 21.2 | 6270 | 41.0 | 8285 | 39.1 | 24,069 | |
| Unknown | 1829 | 2080 | 3018 | 6927 | ||||
| T stage | ||||||||
| Early stage (<15 mm) | 28,467 | 62.4 | 4976 | 30.9 | 8858 | 41.8 | 42,301 | <0.001 |
| Advanced stage (invasive ≥15 mm) | 17,133 | 37.6 | 11,107 | 69.1 | 12,353 | 58.2 | 40,593 | |
| Unknown | 1134 | 1279 | 2978 | 5391 | ||||
| Total | 46,734 | 17,362 | 24,189 | 88,285 | ||||
*Chi-squared test.