Table 1.
Medication Event Monitoring System adherence corresponding to varying numbers of missed doses.
| Self-reported no. of missed doses in past 7 days | Implied 7-day self-reported adherence (%) | N | Missed doses in past 7 days (MEMS)
|
Implied 7-day MEMS adherence
|
Difference between 7-day self-report and MEMS adherence
|
Proportion with 7-day MEMS adherence >90% | |||
|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean (%) | SD | Mean (%) | SD | ||||
| 0 | 100 | 2541 | 1.8 | 3.4 | 87.1 | 24.3 | 12.9 | 24.3 | 0.73 |
| 1 | 93 | 166 | 2.9 | 3.5 | 79.3 | 24.9 | 13.5 | 24.9 | 0.51 |
| 2 | 86 | 50 | 3.6 | 3.1 | 74.0 | 22.4 | 11.7 | 22.4 | 0.28 |
| 3 | 79 | 18 | 4.9 | 4.6 | 65.1 | 32.8 | 13.5 | 32.8 | 0.39 |
| 4 or more | <72 | 14 | 6.1 | 5.4 | 56.1 | 38.9 | −0.5a | 41.1 | 0.21 |
Data on self-reported missed doses missing for two visit questionnaires.
a
Seven of 14 observations in this category have self-reported adherence that is lower than Medication Event Monitoring System (MEMS) adherence.