Table 3.

Cross-tabulation of the number of mastectomies and conservative surgery as derived from the existing algorithm based on HDR data and from surgical registry data in the two study hospitals

	Surgical registry			Total
	Conservative	Reconstructive	Mastectomy
Florence
HDR database
Conservative: (85.2*, 85.3*)	72.8% (123)	0.6% (1)	0	73.4% (124)
Mastectomy (85.4*)	0.6% (1)	17.8% (30)	8.3% (14)	26.6% (45)
Total	73.4% (124)	18.3% (31)	8.3% (14)	100% (169)
Pisa
HDR database
Conservative: (85.2*, 85.3*)	52.1% (87)	10.8% (18)	0	62.9% (105)
Mastectomy (85.4*)	0	27.5% (46)	9.6% (16)	37.1% (62)
Total	52.1% (87)	38.3% (64)	9.6% (16)	100% (167)