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This study explored the association of surgical volume versus process quality with breast cancer survival and recurrence.

Population‐based cancer registration data and National Health Insurance claim data.

This population‐based study linked Taiwan's Cancer Database with Taiwan's National Health Insurance Database to collect data on all patients diagnosed with breast cancer in 2003–2004 who received surgical treatment.

This study included 6,396 female breast cancer patients, reported by 26 hospitals. After controlling for patient and provider characteristics, Cox's regression models did not reveal any association between a physician's surgical volume and breast cancer recurrence or survival, although hospital volume was marginally associated with positive 5‐year recurrence (HR: 1.001, 95%CI: 1.000, 1.001). After controlling for …