How are the outlier-reported outcomes defined?

Definitions of 90-day mortality, 30-day unplanned readmissions, 2-year mortality and 18-month stoma

How is 90-day mortality defined?

90-day mortality is defined from date of death and date of surgery from NBOCA.


How is 30-day unplanned readmissions defined?

30-day unplanned readmission is defined as an emergency admission to any hospital for any cause within 30 days of surgery, according to HES. Date of surgery is taken from HES. Emergency admission is defined in HES as admission via Accident and Emergency services, or emergency admission via general practitioner, Bed Bureau, or consultant outpatient clinic.


How is 18 month stoma defined?

This year, we are not outlier reporting 18-month stoma outcomes. This is in preparation for the introduction of two new stoma formation performance indicators in 2021.

18-month stoma rate was estimated for rectal cancer patients undergoing major surgery. Patients undergoing an abdominoperineal excision of the rectum (APER) or Hartmann’s procedure according to the Audit were assumed to have had a stoma at the time of their primary procedure; this was assumed to be permanent in patients having an APER.


How is 2 year mortality defined?

The observed 2-year mortality rate is the number of patients who died within 2 years divided by the sum of the amount of time each patient is followed for. For patients who survived for the 2 years their follow-up time is 2 years but for a patient who died at 3 months their follow-up time is 3 months.