Table 1.
Characteristics of Primary Studies Included in Medication Adherence Meta-Analyses
| Characteristic | k | Min | Q1 | Mdn | Q3 | Max |
|---|---|---|---|---|---|---|
| Total number of treatment Ss at outcome | 55 | 6 | 22 | 36 | 78 | 196 |
| Total number of control Ss at outcome | 48 | 4 | 23.3 | 35 | 74.3 | 212 |
| Percentage female | 53 | 0 | 33 | 53. 5 | 75 | 100 |
| Percent Black | 53 | 0 | 47.9 | 76.0 | 89.4 | 100 |
| Percent Hispanic | 38 | 0 | 0 | 14.8 | 47.8 | 100 |
| Percent Native American | 25 | 0 | 0 | 0 | 0 | 10 |
| Percent Asian American | 28 | 0 | 0 | 0 | 2 | 100 |
| Mean age (years) | 47 | 38 | 42.4 | 50.6 | 60.85 | 73 |
| Number of intervention sessions | 46 | 1 | 3.3 | 5.5 | 8.4 | 120 |
| Number of days over which intervention was delivered |
53 | 1 | 28 | 91.5 | 183 | 549 |
| Mean number of prescribed medications | 5 | 1.9 | 3.1 | 5.1 | 5.3 | 5.9 |
Note. Includes all studies that contributed to primary analyses at least one effect size for any type of comparison. s=number of reports providing data on characteristic; Q1=first quartile, Q3=third quartile.