| Study | Reason for exclusion |
|---|---|
| Bahena 2016 | No formal diagnosis of DSM/ICD PTSD. |
| Bishop 2012 | Reduction in PTSD symptoms was not the main aim of the intervention. |
| Blankenship 2013 | No formal diagnosis of DSM/ICD PTSD. |
| Bottche 2016 | No formal diagnosis of DSM/ICD PTSD. |
| Brief 2012 | No formal diagnosis of DSM/ICD PTSD. |
| Brief 2013 | No formal diagnosis of DSM/ICD PTSD. |
| Daggett 2014 | No formal diagnosis of DSM/ICD PTSD. |
| Elbers 2013 | No formal diagnosis of DSM/ICD PTSD. |
| Gawlytta 2017 | Not an RCT. |
| Hirai 2005 | No formal diagnosis of DSM/ICD PTSD. |
| Hirai 2012 | No formal diagnosis of DSM/ICD PTSD. |
| Kersting 2011 | No formal diagnosis of DSM/ICD PTSD. |
| Kersting 2013 | No formal diagnosis of DSM/ICD PTSD. |
| Knaevelsrud 2006 | No formal diagnosis of DSM/ICD PTSD. |
| Knaevelsrud 2010a | No formal diagnosis of DSM/ICD PTSD. |
| Knaevelsrud 2010b | No formal diagnosis of DSM/ICD PTSD. |
| Knaevelsrud 2017 | No formal diagnosis of DSM/ICD PTSD. |
| Lange 2001 | No formal diagnosis of DSM/ICD PTSD. |
| Lange 2003 | No formal diagnosis of DSM/ICD PTSD. |
| Maercker 2004 | No formal diagnosis of DSM/ICD PTSD. |
| McGlinchey 2014 | No formal diagnosis of DSM/ICD PTSD. |
| NCT01508377 | No formal diagnosis of DSM/ICD PTSD. |
| NCT01552278 | Reduction in PTSD symptoms was not the main aim of the intervention. |
| NCT01678196 | No formal diagnosis of DSM/ICD PTSD. |
| NCT01710943 | Participants required to screen positive for PTSD or alcohol/drug use. |
| NCT01760213 | No formal diagnosis of DSM/ICD PTSD. |
| NCT01891734 | No formal diagnosis of DSM/ICD PTSD. |
| Nieminen 2016 | Only 25% of the sample met diagnostic criteria for PTSD at baseline. |
| Possemato 2010 | A brief self‐guided telehealth intervention for PTSD in combat veterans: a pilot study. |
| Possemato 2011 | A brief self‐guided telehealth intervention for PTSD in combat veterans: a pilot study. |
| Sayer 2009 | No formal diagnosis of DSM/ICD PTSD. |
| Solzbacher 2012 | No formal diagnosis of DSM/ICD PTSD. |
| Steinmetz 2012 | No formal diagnosis of DSM/ICD PTSD. |
| Stockton 2014 | Reduction in PTSD symptoms was not the main aim of the intervention. |
| Wagner 2007 | No formal diagnosis of DSM/ICD PTSD. |
| Wagner 2012 | No formal diagnosis of DSM/ICD PTSD. |
| Wang 2013 | No formal diagnosis of DSM/ICD PTSD. |
| Zernicke 2014 | No formal diagnosis of DSM/ICD PTSD. |
DSM: Diagnostic and Statistical Manual of Mental Disorders; ICD: International Classification of Diseases; PTSD: post‐traumatic stress disorder; RCT: randomised controlled trial.