Evans 1999.

Methods	Case series
Participants	Family history/risk ‐ women with a lifetime risk of BC ranging from 25%‐80% using the Claus data
Interventions	BRRM = 141 CRRM = 37 Comparison group: statistically modeled group based on the Claus model presuming no RRM
Outcomes	BC incidence
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Free of selection bias?	Low risk	Only women who had undergone BRRM at the participating centers were included.
Free of performance bias?	Low risk	Participants had had BRRM at participating centers
Free of detection bias?	Unclear risk	It is uncertain how the estimation of risk is affected by use of the Claus model.
Free of attrition bias?	Low risk	The 174 women were followed for 400 women years.