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Table 1 SPI by guidance technique

From: Wide local excision of breast carcinomas: the effect of ultrasound and wire guidance on the Surgical Precision Index

Technique Number Mean SPI Median Range
Palpable 44 1.91 1.67 0–8.08
Ultrasound 35 1.20 1.06 0–3.77
Wire 18 1.21 0.61 0–6.76
  1. P = 0.007.