Table 1 Prescribing errors
| Â | Â | Control | Â | Quality of Decision Support | Â | Â | |||
|---|---|---|---|---|---|---|---|---|---|
| Â | Â | No CDS | Correct CDS | Incorrect CDS | Total | ||||
| Â | Â | n | % | n | % | n | % | n | % |
Omission errors | |||||||||
| Â | Wrong drug | 57 | 35.8 | 7 | 25.0 | 116 | 41.9 | 180 | 38.8 |
| Â | Wrong dose | 55 | 34.6 | 9 | 32.1 | 72 | 26.0 | 136 | 29.3 |
| Â | Wrong frequency | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Â | Drug-drug interaction | 28 | 17.6 | 7 | 25.0 | 60 | 21.7 | 95 | 20.5 |
| Â | Wrong route | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Â | Wrong formulation | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Â | Duplicated drug therapy | 19 | 11.9 | 5 | 17.9 | 29 | 10.5 | 53 | 11.4 |
| Â | Not indicated | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Â | Not Prescribed | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
|  |  Total omission errors | 159 |  | 28 |  | 277 |  | 464 |  |
Commission errors | |||||||||
| Â | Not prescribed | 24 | 100.0 | 18 | 100.0 | 229 | 100.0 | 271 | 100.0 |
|  |  Total commission errors | 24 |  | 18 |  | 229 |  | 271 |  |
User originated errors | |||||||||
| Â | Wrong drug | 8 | 5.8 | 10 | 11.6 | 9 | 9.9 | 27 | 8.6 |
| Â | Wrong dose | 43 | 31.4 | 29 | 33.7 | 22 | 24.2 | 94 | 29.9 |
| Â | Wrong frequency | 10 | 7.3 | 6 | 7.0 | 4 | 4.4 | 20 | 6.4 |
| Â | Drug-drug interaction | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Â | Wrong route | 0 | 0.0 | 0 | 0.0 | 1 | 1.1 | 1 | 0.3 |
| Â | Wrong formulation | 1 | 0.7 | 0 | 0.0 | 0 | 0.0 | 1 | 0.3 |
| Â | Duplicated drug therapy | 0 | 0.0 | 0 | 0.0 | 1 | 1.1 | 1 | 0.3 |
| Â | Not indicated | 0 | 0.0 | 1 | 1.2 | 0 | 0.0 | 1 | 0.3 |
| Â | Not prescribed | 75 | 54.7 | 40 | 46.5 | 54 | 59.3 | 169 | 53.8 |
|  |  Total user originated errors | 137 |  | 86 |  | 91 |  | 314 |  |
Total errors | |||||||||
| Â | Wrong drug | 65 | 20.3 | 17 | 12.9 | 125 | 20.9 | 207 | 19.7 |
| Â | Wrong dose | 98 | 30.6 | 38 | 28.8 | 94 | 15.7 | 230 | 21.9 |
| Â | Wrong frequency | 10 | 3.1 | 6 | 4.5 | 4 | 0.7 | 20 | 1.9 |
| Â | Drug-drug interaction | 28 | 8.8 | 7 | 5.3 | 60 | 10.1 | 95 | 9.1 |
| Â | Wrong route | 0 | 0.0 | 0 | 0.0 | 1 | 0.2 | 1 | 0.1 |
| Â | Wrong formulation | 1 | 0.3 | 0 | 0.0 | 0 | 0.0 | 1 | 0.1 |
| Â | Duplicated drug therapy | 19 | 5.9 | 5 | 3.8 | 30 | 5.0 | 54 | 5.1 |
| Â | Not indicated | 0 | 0.0 | 1 | 0.8 | 0 | 0.0 | 1 | 0.1 |
| Â | Not Prescribed | 99 | 30.9 | 58 | 43.9 | 283 | 47.4 | 440 | 41.9 |
|  |  Total errors | 320 |  | 132 |  | 597 |  | 1049 |  |