Bryant 2011.
| Methods | Randomised controlled trial | |
| Participants | 28 survivors of terrorist attacks in Southern Thailand (27 women, 1 man) | |
| Interventions | 8 weekly 60‐minute sessions of CBT (n = 16) vs TAU (n = 12) | |
| Outcomes | PSS, BDI, ICG | |
| Notes | Therapy was conducted by Thai psychologists or psychiatric nurses who were trained to use the treatment manual in 3 2‐day workshops occurring over 12 months. They had no previous experience of CBT. During the trial itself, therapists conducted treatment without formal supervision. TAU comprised the equivalent number of sessions of supportive counselling being provided by psychiatrists who were not trained in CBT. Adherence was not assessed, but checklists indicated components of treatment completed. | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Low risk | Quote: "Patients were randomised according to a random numbers system administered by health officials in Bangkok (fully independent of counsellors and the study co‐ordinator)." |
| Allocation concealment (selection bias) | Low risk | Quote: "Patients were randomised according to a random numbers system administered by health officials in Bangkok (fully independent of counsellors and the study co‐ordinator)." Comment: Allocation was independent and remote from study site. |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | Quote: "There were no treatment drop‐outs, and so analyses focus on all patients who were randomised into the study." |
| Selective reporting (reporting bias) | Low risk | Comment: All specified and expected outcomes appear to have been reported. |
| Other bias | High risk | Recruitment was terminated prematurely due to health workers being targeted by the terrorists. Small sample size (n = 28) |
| Blinding of participants and personnel (performance bias) All outcomes | High risk | Comment: Participants were aware of their allocation. |
| Blinding of outcome assessment (detection bias) All outcomes | Low risk | Quote: "Assessments conducted at post‐treatment and 3 months following treatment were conducted by independent personnel unaware of patients’ treatment condition." |