Table 1.
Operationalization and Descriptive Statistics for Moderators
| MODERATOR | Values | Coding description and criteria | Descriptive Statistics |
|---|---|---|---|
| Participant Features | |||
| Risk status of participants | 1=Selected/Indicated 0=Universal | Dichotomous variable representing whether the study was universally implemented or if study participants were selected/indicated because they were from a group at increased risk for depression or had elevated depressive symptoms. | Selected/Indicated = 35 Universal = 25 |
| Participant gender | % Female | Continuous variable representing the percentage of the sample that is female. | M = 57.06, SD = 19.44 |
| Participant ethnicity | % Caucasian | Continuous variable representing the percentage of the sample that is Caucasian. | M = 63.22, SD = 29.36 |
| Participant age | Age in years | Continuous variable representing the mean age of the sample. | M = 14.02, SD = 2.90 |
| Intervention Features | |||
| Cognitive change content | 1=Yes, 0=No | Dichotomous variable representing if the intervention included changing negative cognitions thought to lead to depression. | Yes = 45, No = 15 |
| Behavioral activation content | 1=Yes, 0=No | Dichotomous variable representing if the intervention included activating positive behavioral change. | Yes = 14, No = 46 |
| Problem solving content | 1=Yes, 0=No | Dichotomous variable representing if the intervention included improving problem solving abilities. | Yes = 32, No = 28 |
| Social skills content | 1=Yes, 0=No | Dichotomous variable representing if the intervention included improving social skills. | Yes = 29, No = 31 |
| Intervention Duration | Number of hours | Continuous variable representing the number of intervention hours. | M = 12.84, SD = 6.82 |
| Homework | 1=Yes, 0=No | Dichotomous variable representing if the intervention included homework or practice assignments. | Yes = 41, No = 18 |
| Provider Features | |||
| Professional interventionist | 1=Yes, 0=No | Dichotomous variable representing if facilitator was a professional interventionist, or a endogenous provider, such as a teacher, school nurse, or counselor. | Yes = 46, No = 12 |
| Design Features | |||
| Randomization | 1=Yes, 0=No | Dichotomous variable representing whether participants were randomly assigned to intervention and control conditions. | Yes = 52, No = 6 |
| Interview assessment | 1=Yes, 0=No | Dichotomous variable representing if diagnostic interviews were used to assess depression. | Yes = 10, No = 50 |
| Publication Status | 1=Yes, 0=No | Dichotomous variable representing if paper coded for meta-analysis was published in a peer-reviewed journal. | Yes = 50, No = 10 |
| Incorrect unit of analysis | 1=Yes (Incorrect) 0=No (Correct) | Dichotomous variable representing if the unit of randomization incorrectly matches the unit of analysis. | Yes = 7, No = 53 |
| Follow-up duration | Length of follow-up | Continuous variable representing the length of follow-up in months. | M = 11.91, SD = 11.50 |