Which patients are included in trust reported negative circumferential rectal resection margin rate in the 2018 Clinical Outcomes Publication?

All rectal cancer patients aged 18 or over diagnosed between 1 April 2016 and 31 March 2017 who, according to NBOCA, underwent a major resection (regardless of surgical urgency or curative intent).

This indicator is calculated by dividing the number of rectal resections with reported negative margins by the number of rectal resections reported to the audit. A very low proportion of resections with negative margins is likely to be due to poor data submission by the unit, and we would encourage units to review their data submission if this is the case.