Effects of patient-level interventions over time
| Study period | Number of discrepancies per patient (95% CI) | Adjusted rate ratio (95% CI)* | P value | |
| No patient-level interventions | At least one patient-level intervention | |||
| Months 1–6 | 2.50 (2.05 to 3.06) | 1.41 (1.15 to 1.75) | 0.58 (0.53 to 0.64) | <0.001 |
| Months 7–12 | 2.39 (1.95 to 2.92) | 1.33 (1.09 to 1.64) | 0.54 (0.50 to 0.58) | <0.001 |
| Months 13–18 | 2.39 (1.95 to 2.93) | 0.96 (0.78 to 1.18) | 0.40 (0.35 to 0.45) | <0.001 |
*Adjusted for patient age, service (medical vs surgical), patient understanding of medications and need for caregiver as a source of medication information. Number of medications used as a model offset in all models. Clustered by site in all models.