PST for Treating Primary Care Patients' Depression and/or Anxiety; Results of the Cochrane Collaboration's Tool for Assessing Risk of Bias*
| Study/Year | Random Sequence Generation | Allocation Concealment | Blinding of Participants and Personnel | Blinding of Outcome Assessment | Incomplete Outcome Data | Selective Reporting | Other Source of Bias |
|---|---|---|---|---|---|---|---|
| Barrett et al. (2001) | + | + | ? | ? | ? | + | + |
| Chibanda et al. (2014) | + | ? | ? | ? | ? | + | ? |
| Katon et al. (2004) | + | + | − | + | ? | + | − |
| Lam et al. (2009) | + | + | + | ? | ? | + | + |
| Lynch et al. (2004) | ? | ? | ? | ? | ? | ? | ? |
| McCusker et al. (2008) | + | + | ? | ? | ? | + | + |
| Mynors-Wallis et al. (2000) | − | + | + | ? | ? | ? | ? |
| Oxman et al. (2008) | + | ? | − | ? | ? | + | ? |
| Reynolds et al. (2014) | + | + | + | + | + | + | + |
| Schmaling et al. (2002) | + | ? | − | − | ? | ? | + |
| Williams et al. (2000) | + | + | ? | ? | ? | ? | + |
| Number of “+”s | 9 | 7 | 3 | 2 | 1 | 7 | 6 |
↵* “+” = criteria were met in primary studies, thus no bias present; “?” = unclear whether or not criteria met from reading of primary studies; and “−” = criteria were not met in primary studies, thus bias present.