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Table 4 Cross-tabulation of the number of mastectomies and conservative surgery as derived from HDR data and surgical registry data in the two study hospitals, using the new classification algorithm

From: Catching and monitoring clinical innovation through performance indicators. The case of the breast-conserving surgery indicator

  Surgical registry Total
Conservative Reconstructive Mastectomy
Florence
 HDR database
  Conservative 72.8% (123) 0 0 72.8% (123)
  Reconstructive 0 16% (27) 0 16% (27)
 Mastectomy 0.6%a (1) 2.4%b (4) 8.3% (14) 11.2% (19)
 Total 73.4% (124) 18.3% (31) 8.3% (14) 100% (169)
Pisa
 HDR database
  Conservative 52.1% (87) 0 0 52.1% (87)
  Reconstructive 0 38.3% (64) 0 38.3% (64)
  Mastectomy 0 0 9.6% (16) 9.6% (16)
 Total 52.1% (87) 38.3% (64) 9.6% (16) 100% (167)
  1. aThis case was a quadrantectomy wrongly classified as 85.4*
  2. bIn 4 cases, in addition to code 85.4, we found codes 85.89 (other mammoplasty), 86.70 (free flap reconstruction) or 86.93 (insertion of generic tissue expander)