Prevalence of erroneous orders and action taken to remedy them, by clinical specialty and organisation
| Organisation/specialty | Number of medication orders screened | Incidence of erroneous medication orders (95% CI) | Errors identified per 100 patient days | Percentage of errors that resulted in an intervention | Number of errors for which the number of doses given was recorded | Mean number of doses given or omitted before error corrected |
| Medical admissions | 4059 | 16.3% (15.2% to 17.4%) | 80 | 76.4% | 601 (87.0%) | 0.5 |
| Surgical | 2546 | 12.2% (10.9% to 13.5%) | 37 | 54.9% | 303 (90.7%) | 1.6 |
| Total | 6605 | 14.7% (13.8% to 15.6%) | 58 | 69.4% | 904 (88.2%) | 0.9 |
| A | 2689 | 13.6% (12.3% to 14.9%) | 53 | 70.1% | 333 (86.7%) | 0.6 |
| B | 1812 | 12.2% (10.7% to 13.7%) | 47 | 74.5% | 207 (89.6%) | 0.8 |
| C | 2104 | 18.4% (16.7% to 20.1%) | 74 | 66.0% | 364 (88.8%) | 1.1 |
| Total | 6605 | 14.7% (13.8% to 15.6%) | 58 | 69.4% | 904 (88.2%) | 0.9 |