Table 3.
Comparison of Error Rates Between Baseline, 12 Weeks, and 1 Year
| N* | Rates per 100 Prescriptions (95% CI) † | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Total | Baseline | 12 Weeks | 1 Year | Baseline | 12 Weeks | p-value║ | 1 Year | p-value¶ | |
| N | -- | -- | -- | -- | 1298 | 1331 | -- | 1303 | -- |
| Prescribing errors‡ | 1038 | 541 | 316 | 181 | 35.7 (23.2,54.8) | 21.1 (14.0,31.9) | <0.001 | 12.2 (8.6,17.4) | <0.001 |
| Inappropriate abbreviation errors | 849 | 504 | 223 | 122 | 24.1 (15.1,38.5) | 10.6 (6.4,17.4) | <0.001 | 5.9 (4.0,8.9) | <0.001 |
| Non- abbreviation prescribing error§ | 219 | 50 | 106 | 63 | 8.5 (4.6,15.9) | 17.7 (9.5,33.0) | <0.001 | 10.8 (6.2,18.6) | 0.337 |
| Rule violations | 335 | 106 | 105 | 124 | 45.1 (28.8,70.7) | 41.4 (28.2,60.8) | 0.627 | 48.0 (30.1,76.5) | 0.763 |
| Near misses | 67 | 25 | 23 | 19 | 8.0 (1.6,39.1) | 6.9 (1.7,27.3) | 0.555 | 5.6 (1.2,25.8) | 0.146 |
* Number of prescriptions with errors
† Calculated using Poisson regression, adjusting for clustering and patient characteristics
‡ Excluding rule violations
§ Without errors due to inappropriate abbreviations; excluding rule violations
║ p-value for 12 weeks to baseline comparison
¶ p-value for 1 year to baseline comparison