Error prevalence and harm assessment
| Type of error | Overall | ||||
| Prescribing | Monitoring | MAE | Dispensing | ||
| Number of residents with an error (n = 256) (%; 95% CI) | 100 (39.1%; 33.0 to 45.3) | 27 (10.5%; 7.1 to 15.0) | 57 (22.3%; 17.3 to 27.9) | 94 (36.7%; 30.8 to 42.9) | 178 (69.5%; 63.5 to 75.1) |
| Mean number of errors per resident (95% CI) | 0.60 (0.48 to 0.71) | 0.13 (0.08 to 0.17) | 0.45 (0.32 to 0.58) | 0.73 (0.56 to 0.90) | 1.91 (1.64 to 2.17) |
| Median number of errors per resident (range) | 0 (0–6) | 0 (0–3) | 0 (0–7) | 0 (0–9) | 1 (0–13) |
| Number of errors/opportunity for error (%; 95% CI) | 153/1837 (8.3%; 7.1 to 9.7) | 32/218 (14.7%; 10.3 to 20.1) | 116/1380 (8.4%; 7.0 to 10.0) | 187/1915 (9.8%; 8.5 to 11.2) | 488/5350 (9.1%; 8.4 to 9.9) |
| Mean harm score* (95% CI) | 2.6 (2.4 to 2.8) | 3.7 (3.4 to 4.0) | 2.1 (1.9 to 2.3) | 2.0 (1.8 to 2.2) | 2.6 (2.5 to 2.7) |
| Median harm score* (range) | 2 (0.2 to 5.8) | 3 (2.8 to 5.2) | 2 (0.1 to 5.8) | 1 (0.2 to 6.6) | 2 (0.1 to 6.6) |
MAE, medication administration error.
*Assessed by a 10-point scale19 (0 = no harm; 10 = death).