Study | Country | Sample size/study duration | Setting | Method of measuring errors | Findings | Study quality |
Kruse 199216 | Australia | 129 234 oral, inhaled or topical administrations over 46 weeks | 3 wards of a geriatric assessment and rehabilitation unit | Chart review data supplemented by incident reports |
| Fair |
Modic 201623 | USA | 5238 administrations of subcutaneous insulin to 266 patients | Patients with diabetes at a 1400-bed quaternary care hospital | In double check group, anonymous self-report; in single check group, review of electronic medical records |
| Fair |
Douglass 201825 | USA | 43 pairs of ED and ICU nurses | Simulated adult patient in a medical education centre | Direct observation |
| Good |
ED, emergency department; ICU, intensive care unit.