Table 2.
Design information for the 24 studies examined in this review.
| Authors | Sample size | Research design | Sampling design | Assignment |
|---|---|---|---|---|
| Bischof, Rumpf, Hapke, Meyer, & John (2000) | 135 | cross-sectional | convenience | none |
| Bond, Kaskutas, & Weisner (2003) | 655 | longitudinal | consecutive | none |
| Carlson, Dilts, & Radcliff (1994) | 71 | cross-sectional | entire population | none |
| Flynn, Alvarez, Jason, Olson, & Davis, (2006) | 274 | cross-sectional | convenience | none |
| Galanter, Talbott, Gallegos, & Rubenstone (1990) | 100 | cross-sectional | cohort | none |
| George & Tucker (1996) | 45 | cross-sectional | convenience | none |
| Humphreys, Finney, & Moos (1994) | 439 | longitudinal | convenience | none |
| Humphreys, Mankowski, Moos, & Finney (1999) | 2867 | longitudinal | consecutive | none |
| Humphreys, Mavis, & Stoffelmayr (1994) | 558 | longitudinal | consecutive | none |
| Humphreys, Moos, & Cohen (1997) | 395 | longitudinal | convenience | none |
| Humphreys & Noke (1997) | 2337 | longitudinal | consecutive | none |
| Kaskutas, Bond, & Humphreys (2002) | 654 | longitudinal | consecutive | none |
| Longabaugh, Wirtz, Zweben, & Stout (1998) | 806 | longitudinal | convenience | random |
| Majer, Jason, Ferrari, Venable, & Olson (2002) | 100 | cross-sectional | convenience | none |
| Ouimette, Moos, & Finney (1998) | 3018 | longitudinal | consecutive | none |
| Pagano, Friend, Tonigan, & Stout (2004) | 1501 | longitudinal | convenience | random |
| Project MATCH Research Group (1998a) | 1726 | longitudinal | convenience | random |
| Project MATCH Research Group (1998b) | 506 | longitudinal | convenience | random |
| Rush (2002) | 125 | cross-sectional | convenience | none |
| Sheeren (1988) | 59 | cross-sectional | convenience | none |
| Snow, Prochaska, & Rossi (1994) | 191 | cross-sectional | convenience | none |
| Timko, Finney, & Moos (2005) | 466 | longitudinal | convenience | none |
| Zemore & Kaskutas (2004) | 200 | cross-sectional | stratified convenience | none |
| Zemore, Kaskutas, & Ammon (2004) | 279 | longitudinal | convenience | random |