TABLE V.

Multivariate analysis of breast cancer–specific mortality by use of contralateral prophylactic mastectomy (CPM)

Exposure	Crude HR	95% CI	p Value	Adjusted HRa	95% CI	p Value
CPM	0.55	0.34 to 0.90	0.02	0.73	0.44 to 1.21	0.22
No CPM	Reference			Reference

^aAdjusted for patient, tumour and treatment characteristics (age, neoadjuvant chemotherapy, breast-conserving surgery followed by re-excision, multifocality, multicentricity, size of primary tumour, total number of involved lymph nodes, lymphovascular invasion, primary histologic type, pathologic subtype, estrogen and progesterone receptor status, adjuvant chemotherapy, and adjuvant radiation therapy).

HR = hazard ratio, CI = confidence interval.