Figure 2.

Actual mortality minus risk adjusted (expected) mortality by surgical centre in retrospective review. Risk adjustment was made with either Parsonnet scores or EuroSCOREs. Participating centres were 1 Queen Elizabeth Medical Centre, Birmingham; 2 Bristol Royal Infirmary; 3 Papworth Hospital NHS Trust; 4 Victoria Hospital, Blackpool; 5 Wythenshawe Hospital, Manchester; 6 Freeman Hospital, Newcastle; 7 Guy's and St Thomas's Hospitals, London; 8 Kings College Hospital, London; 9 Imperial College School of Medicine, Hammersmith Hospital, London; 10 University College London Hospitals, London