Table 1. Number of adverse events by specialty Specialty No (%) of records reviewed No of patients with adverse events detected Total No of adverse events detected All (% of records) Preventable (% of events) All (% of records) Preventable (% of events) General medicine 273 (27) 24 (8.8) 18 (75) 25 (9.2) 19 (76) General surgery 290 (29)  41 (14.1) 17 (41)  47 (16.2) 20 (43) Obstetrics 174 (17)  7 (4.0)  5 (71)  7 (4.0)  5 (71) Orthopaedics 277 (27)  38 (13.7) 12 (32)  40 (14.4) 13 (33) Total 1014 110 (10.8) 52 (47) 119 (11.7) 57 (48)