Table 2.
Quality assessing rating with Cochrane collaboration's tool.
| Author, Year | D1 | D2 | D3 | D4 | D5 | D6 | D7 | TOTAL |
|---|---|---|---|---|---|---|---|---|
| Studies on Youth | ||||||||
| Ollendick et al., 2009 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk | Unclear risk | UNCLEAR |
| Ollendick et al., 2015 | Unclear risk | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk | UNCLEAR |
| Ollendick et al., 2017 | Unclear risk | Unclear risk | Unclear risk | Low risk | Low risk | Low risk | Low risk | UNCLEAR |
| Öst et al., 2001b | Unclear risk | High risk | Unclear risk | Low risk | Unclear risk | Low risk | Low risk | HIGH |
| Studies on Adults | ||||||||
| De Jongh et al., 1995 | Unclear risk | Low risk | Unclear risk | Low risk | Low risk | Low risk | Low risk | UNCLEAR |
| Götestam, 2002 | Low risk | High risk | Unclear risk | Low risk | High risk | Low risk | High risk | HIGH |
| Haukebo et al., 2008 | Unclear risk | Unclear risk | Low risk | Low risk | Low risk | Low risk | Low risk | UNCLEAR |
| Hemyari et al., 2019 | Unclear risk | High risk | High risk | Low risk | Low risk | Low risk | High risk | HIGH |
| Huey and Pan, 2006 | Unclear risk | Unclear risk | Unclear risk | Low risk | High risk | Low risk | Unclear risk | HIGH |
| Hyett et al., 2018 | Low risk | Low risk | Unclear risk | Low risk | Unclear risk | Low risk | Low risk | UNCLEAR |
| Moldovan and David, 2014 | Low risk | Low risk | Unclear risk | Low risk | Low risk | Low risk | High risk | HIGH |
| Muller et al., 2011 | Unclear risk | Unclear risk | Unclear risk | Low risk | Unclear risk | Low risk | Low risk | UNCLEAR |
| Nuthall and Townend, 2006 | High risk | Unclear risk | Unclear risk | Low risk | Low risk | Low risk | Unclear risk | HIGH |
| Öst et al., 1992 | Unclear risk | Unclear risk | Unclear risk | Low risk | Low risk | Low risk | Unclear risk | UNCLEAR |
| Öst, 1996 | Unclear risk | Unclear risk | High risk | Low risk | Low risk | Low risk | High risk | HIGH |
| Öst et al., 1997a | Unclear risk | Unclear risk | Unclear risk | Low risk | Low risk | Low risk | High risk | HIGH |
| Öst et al., 2001a | Unclear risk | Unclear risk | High risk | Low risk | Low risk | Low risk | High risk | HIGH |
| Vika et al., 2009 | Low risk | Unclear risk | Low risk | Low risk | Low risk | Low risk | High risk | HIGH |
D1, selection bias: random sequence generation; D2, selection bias: allocation concealment; D3, performance bias: blinding of participants and personnel; D4, detection bias: blinding of outcome assessment; D5, attrition bias: incomplete outcome data; D6, reporting bias: selective reporting; D7, other bias: anything else, ideally prespecified.