Table 4 The pooled early-stage (0–II) breast cancer detection in different subgroups of population screening programs (China, 2010–2023)
Subgroup | Databases | ECDRs, ‰ | The proportion of early-stage breast cancer, % | ||||
|---|---|---|---|---|---|---|---|
Total | Events | Estimates (95% CI) | Total | Events | Estimates (95%CI) | ||
Residence | |||||||
 Urban | 15 | 2,546,483 | 1,863 | 1.60 (1.19–2.06) | 4,141 | 1,863 | 85.70 (68.73–97.29) |
 Rural | 18 | 10,114,311 | 4,055 | 0.44 (0.31–0.60) | 5,442 | 4,055 | 75.08 (66.16–83.15) |
Screening process | |||||||
 CBE followed by BUS or MAM | 4 | 1,303,128 | 438 | 0.32 (0.26–0.38) | 514 | 438 | 89.30 (85.79–92.48) |
 BUS followed by MAM | 18 | 11,191,995 | 5,116 | 0.52 (0.37–0.69) | 8,648 | 5,116 | 74.18 (61.87–84.92) |
 BUS in parallel with MAM | 10 | 161,501 | 360 | 2.49 (1.89–3.16) | 416 | 360 | 88.18 (84.53–91.46) |
Study period | |||||||
 Before2012 | 14 | 2,260,554 | 887 | 1.12 (0.79–1.50) | 1,181 | 887 | 82.94 (69.47–93.52) |
 In and after2012 | 19 | 10,400,240 | 5,031 | 0.69 (0.52–0.89) | 8,402 | 5,031 | 78.18 (66.41–88.19) |
Follow-up method | |||||||
 No | 15 | 8,012,762 | 2,907 | 0.46 (0.30–0.64) | 6,041 | 2,907 | 71.10 (59.07–81.95) |
 Interview | 11 | 4,600,391 | 2,874 | 0.85 (0.65–1.06) | 3,387 | 2,874 | 85.91 (84.65–87.14) |
 Second screening | 7 | 47,641 | 137 | 2.62 (1.66–3.78) | 155 | 137 | 90.05 (84.07–94.95) |