Patients, medication orders and prescribing errors identified
| Pre-intervention | Post-intervention | RRR (%) | ARR (%) | Statistical analysis OR | |
| Patients | 730† | 751* | – | – | – |
| Number of orders written for all patients | 9772* | 10 352* | – | – | – |
| Number of medication orders per patient | 12 (0–60)† | 12 (0–70)† | – | – | – |
| Prescribing errors | |||||
| All prescribing errors identified (% of orders) | 2300 | 1935 | – | – | – |
| Number of patients with ⩾1 errors (% of patients) | 591 (81.0%)* | 587 (78.1%)* | 3.5 | 2.9 | χ2 test, p = 0.182 |
| Prescribing errors per patient | 2 (0–20)† | 2 (0–17)† | Mann–Whitney U test, p = 0.021 | ||
| Percentage of errors per order per patient‡ | 20.0% (0–250%)† | 15.8% (0–180%)† | 21.0 | 4.2 | Mann–Whitney U test, p = 0.03 |
ARR, absolute risk reduction; OR, odds ratio; RRR, relative risk reduction.
*Number (percentage).
†Median (range).
‡Calculated from total number of errors per patient divided by total number of orders multiplied by 100.