Breast cancer screening and early diagnosis in China: a systematic review and meta-analysis on 10.72 million women

Table 2 The pooled results of breast cancer screening programs by screening model (China, 2010–2023)

Screening model	Databases	Total	Events	Estimates (95% CI)
CDR
Opportunistic	8	224,240	1,395	11.99‰ (5.14‰–21.57‰)
Population	39	12,760,718	10,408	1.32‰ (1.10‰–1.56‰)
ECDR
Opportunistic	6	115,557	660	4.90‰ (1.02‰–11.37‰)
Population	33	12,662,808	5,918	0.82‰ (0.66‰–0.99‰)
The proportion of early-stage cancer
Opportunistic	6	806	660	72.42% (57.28%–85.57%)
Population	33	9,583	5,918	80.17% (71.40%–87.83%)

Abbreviations: CDR cancer detection rate, it was calculated as the number of detected breast cancers divided by the number of participants, ECDR Early-stage cancer detection rate, it was calculated as the number of early-stage (0–II) breast cancers divided by the total number of participants; The proportion of early-stage cancer, it was calculated as the number of early-stage (0–II) breast cancers divided by the total number of TNM stage breast cancers

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