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Characteristics and effectiveness of interventions with a long-term follow-up period (≥6 months)
| Study | Medication for | Type of reminder | Study quality | Long-term effect* on adherence measured with: | |
| Electronic monitoring | Self-report | ||||
| Pop-Eleches et al29 | HIV | SMS | High | ++ | |
| Simoni et al39 | HIV | Pager | High | – | – |
| Christensen et al32 | Hypertension | ERD | Low | – | – |
++= Overall effect; + = subgroup effect; – = no effect.
ERD, electronic reminder device; SMS, short message service.
