Proportion of prescribing errors detected by staff group within each hospital, n (%)
| Hospital | Doctor | Nurse | Pharmacist | Other* | Total |
| All prescribing errors | |||||
| Hospital A | 358 (38.2) | 83 (8.8) | 145 (15.5) | 352 (37.5) | 938 (100) |
| Hospital B | 256 (44.4) | 48 (8.3) | 119 (20.7) | 153 (26.6) | 576 (100) |
| Total | 614 (40.6) | 131 (8.7) | 264 (17.4) | 505 (33.4) | 1514 (100) |
| Potentially serious errors | |||||
| Hospital A | 143 (36.2) | 38 (9.6) | 57 (14.4) | 157 (39.7) | 395 (100) |
| Hospital B | 84 (45.4) | 16 (8.6) | 35 (18.9) | 50 (27.0) | 185 (100) |
| Total | 227 (39.1) | 54 (9.3) | 92 (15.9) | 207 (35.7) | 580 (100) |
| All prescribing errors involving high-risk drugs | |||||
| Hospital A | 54 (38.8) | 12 (8.6) | 11 (7.9) | 62 (44.6) | 139 (100) |
| Hospital B | 49 (59.8) | 5 (6.1) | 12 (14.6) | 16 (19.5) | 82 (100) |
| Total | 103 (46.6) | 17 (7.7) | 23 (10.4) | 78 (35.3) | 221 (100) |
| Potentially serious errors involving high-risk drugs | |||||
| Hospital A | 36 (38.3) | 10 (10.6) | 8 (8.5) | 40 (42.6) | 94 (100) |
| Hospital B | 20 (54.1) | 4 (10.8) | 4 (10.8) | 9 (24.3) | 37 (100) |
| Total | 56 (42.7) | 14 (10.7) | 12 (9.2) | 49 (37.4) | 131 (100) |
*‘Other’ could be other members of staff, for example, dietitians, external healthcare providers and parent/carers. However, there was not enough information on the medication charts for our research pharmacists to determine exactly who they were.