Wirral University Teaching Hospital NHS Foundation Trust

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Explanatory Note

Funnel plots display trust risk-adjusted outcomes for 90-day mortality, 30-day unplanned readmission, 2-year mortality and, for rectal cancer patients, 18-month stoma rate. The funnel regions represent the 95 per cent limit and the 99.8 per cent limit for trusts compared to the national average. Those trusts with results outside the outer (99.8 per cent) limit are considered potential outliers.

Risk adjustment is performed using the seven items listed under Data Quality as well as mode of admission (elective/emergency) and number of co-morbidities according to HES, and an interaction between age and distant metastases. Missing values are imputed using Multiple Imputation. The model for two-year mortality additionally includes interactions between follow-up time (0-3 months after surgery vs. 3-24 months after surgery) and all of the risk factors.

A stoma is considered to be reversed if a HES record with relevant code is identified with 18 months of the initial surgical procedure.

Trust Number Adjusted Observed
Wirral University Teaching Hospital NHS Foundation Trust 120 14.9% 11.6%
Other trusts within the region: Cheshire and Merseyside
Countess of Chester Hospital NHS Foundation Trust 100 15.1% 13%
East Cheshire NHS Trust 63 21.4% 17.5%
Liverpool University Hospitals NHS Foundation Trust - University Hospital Aintree 216 19.6% 15.6%
Mid Cheshire Hospitals NHS Foundation Trust 101 15.9% 12.5%
St Helens and Knowsley Hospitals NHS Trust 142 17% 17.6%
Warrington and Halton Hospitals NHS Foundation Trust 59 15.6% 14%