Table 2.
Study and sample characteristics
| Characteristic | N (%) | Characteristic | N (%) |
|---|---|---|---|
| Publication year | Mean agea | 11.7 | |
| 1990–1999 | 1 (4.2) | Free or reduced lunchb | 78.4 |
| 2000–2009 | 15 (62.5) | Percent malec | 52.5 |
| 2010–2014 | 8 (33.3) | Predominant race | |
| Grade level | Caucasian | 4 (16.7) | |
| Elementary | 4 (16.7) | African American | 11 (45.8) |
| Middle school | 10 (41.7) | Hispanic | 1 (4.2) |
| High school | 1 (4.2) | Asian | 1 (4.2) |
| Mixed | 9 (37.5) | Not reported | 7 (29.2) |
| Control group condition | Research design type | ||
| Nothing or waitlist | 17 (70.8) | Randomized controlled | 7 (29.2) |
| Treatment as usual | 3 (12.5) | Quasi-experimental | 17 (70.8) |
| Alternative treatment | 4 (16.7) | Publication type | |
| Sample size | Journal | 13 (54.2) | |
| 1–150 | 7 (29.2) | Dissertation or thesis | 5 (20.8) |
| 151–300 | 3 (12.5) | Government report | 1 (4.2) |
| 301–600 | 5 (20.8) | Other report | 5 (20.8) |
| 601 and greater | 9 (37.5) | Country | |
| At-risk identifierd | United States | 23 (95.8) | |
| Low-income | 10 (41.7) | Ireland | 1 (4.2) |
| High minority | 18 (75.0) | Australia | 0 (0.0) |
| Low-academic achievement | 4 (16.7) | Canada | 0 (0.0) |
| Other | 4 (16.7) | United Kingdom | 0 (0.0) |
a
Reported in 12 studies
b
Reported in 10 studies
c
Reported in 22 studies
d
Categories not mutually exclusive