| Methods |
Randomised controlled trial |
| Participants |
11 Vietnam War veterans with DSM‐IV PTSD with a CAPS score greater than 60 in the USA |
| Interventions |
10 sessions of Virtual Reality Exposure (n = 6) vs 10 sessions of person‐centred therapy (n = 5) |
| Outcomes |
CAPS, BDI |
| Notes |
Therapist credentials/experience is not reported. It is unclear whether or not treatment adherence was assessed. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
Unclear risk |
Comment: The method of sequence generation was not reported. |
| Allocation concealment (selection bias) |
Unclear risk |
Comment: There is no mention of any measures taken to conceal allocation. |
| Incomplete outcome data (attrition bias)
All outcomes |
Unclear risk |
Comment: One participant dropped out of each group. Reasons for drop‐out are not reported. It is unclear how missing data were handled. |
| Selective reporting (reporting bias) |
Low risk |
Comment: All specified outcomes were reported. |
| Other bias |
High risk |
Comment: PCT was developed as a control condition for the purposes of the study. |
| 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: “Participants were administered the measures or interviews at pretreatment, posttreatment, and six‐month follow‐up by a licensed clinical psychologist with 3 years of experience working with Vietnam veterans. She remained blind to treatment condition.” |
