Table 2.
A table of the numbers and percentages of participants enrolled in the studies at baseline, poststudy, and follow-up to display rates of retention, in descending order, with an amount of professional contact. Percentages for participants retained were calculated by taking the total number of participants at baseline and dividing it by the participants at poststudy or follow-up. These scores were used to calculate the overall mean and median percentages.
| Author | Professional contact | Participants at baseline, n | Trial retention, n (%) | Intervention retention (%) | ||
|
|
|
|
After the intervention | Follow-up |
|
|
| Osborn et al [55]a | Shamiri-digital was completed in classrooms over 1 session, where teachers supervised. | 56 | 56 (100) | 56 (100) | 100 | |
| Fleming et al [49] | During class time under minimal supervision from school staff. Weekly check-ins from researcher for safety checks and practical support. | 32 | 31 (96.8) | 25 (78.1) | 69 | |
| Poppelaars et al [51] | Completed at home. | 208 | 201 (96.6) | 159 (76.5) | 93 (self-report) | |
| Merry et al [50] | Safety checks at all time points plus an additional check at 1 month. | 187 | 170 (90.9) | 168 (89.8) | 60 | |
| Smith et al [58] | Study information given by a clinical psychologist before enrollment. Stressbusters completed at school in an assigned room. | 112 | 100 (89.2) | 99 (88.4) | 86 | |
| Stasiak et al [52] | School counselors instructed to give practical support. Therapeutic support provided only if requested from young people. Completed in the counselor’s office. | 34 | 30 (88.2) | 25 (73.5) | 82 | |
| Sportel et al [60] | Weekly emails with links to complete cognitive bias modification training and a reminder if not completed. | 240 | 200 (83) | 139 (57.9) | 42 | |
| Boniel-Nissim and Barak [59] | Email checks conducted for diary entries. | 161 | 124 (78) | —b | — | |
| Reid et al [56] | High-risk alert activated by psychologist if a young person indicated suicide or self-harm; young person’s community team informed. | 112 | 87 (77.6) | 86 (76.7) | 52.9 | |
| O’Kearney et al [54]a | Completed at school during tutor period under teacher supervision. Researchers attended the first session to check successful log-in. | 23 | 17 (73.9) | 18 (72) | 40 (half or more modules) | |
| Wright et al [57] | Practical support to accessing Stressbusters from researchers. | 91 | 55 (60.4) | No follow-up data | 70 | |
| Lillevoll et al [53]a | Automated email reminders of level of MoodGYM use (tailored email group not included). | 198 | 19 (10.4) | No follow-up data | 0.04 | |
aStudies using subgroup analysis data only and not the original sample number.
bData not available.