Numbers of ‘wrong dose’ medication incidents reported over a 7-year period (n=1568) by stage and category
| Magnitude of error | Total % | |||
| Greater than 1 | Less than 1 | Unknown | ||
| (Overdose errors) | (Underdose errors) | |||
| Stage of the medicines process | ||||
| Prescribing | 429 | 191 | 82 | 702 |
| 27.4% | 12.2% | 5.2% | 44.8% | |
| Dispensing | 126 | 88 | 9 | 223 |
| 8% | 5.6% | 0.6% | 14.2% | |
| Administration | 371 | 185 | 87 | 643 |
| 23.7% | 11.8% | 5.5% | 41% | |
| Category of incident | ||||
| Wrong dose | 772 | 379 | 131 | 1282 |
| 49.2% | 24.2% | 8.4% | 81.8% | |
| Wong dose preparation | 54 | 38 | 13 | 105 |
| 3.4% | 2.4% | 0.8% | 6.7% | |
| Wrong rate | 81 | 37 | 28 | 146 |
| 5.2% | 2.4% | 1.8% | 9.3% | |
| Wrong quantity | 19 | 10 | 6 | 35 |
| 1.2% | 0.6% | 0.4% | 2.2% | |
| Total | 926 | 464 | 178 | 1568 |
| 59.0% | 29.6% | 11.4% | 100% | |