The Effectiveness of Written Exposure Therapy for PTSD

Study 1: The goal of this study is to use a pilot RCT to assess the effectiveness ofWritten Exposure Therapy (WET) and a mindfulness‐based app (MBA) for managing PTSD andcomorbid insomnia in China. The main questions it aims to answer are: 1. Does WET alone reduce PTSD symptoms in Chinese patients with PTSD and subthresholdPTSD? 2. Does the addition of MBA to WET lead to greater reductions in comorbid insomniasymptoms compared to WET alone?45 participants will be allocated to MCC, WET, and WET+MBA on a 1:1:1 ratio. Researcherswill compare WET alone and MCC to see if WET provides benefits in managing PTSD.Researchers will compare WET plus MBA and WET group to see if the integrated MBAtreatment provides additional benefits in managing insomnia.Study 2: The study aims to examine the effectiveness of the online revised writtenexposure therapy (WET‐R) for PTSD and subclinical PTSD among Chinese adults with arandomized controlled trial. The study will recruit 90 participants, with 60 randomizedto the online WET‐R group, and 30 randomized to the minimal contact control (MCC) group.The WET‐R intervention consists of 5‐7 one to one sessions. The primary outcome PTSDSymptom Scale ‐ Interview for DSM‐5 (PSSI‐5) will be administered on baseline,post‐treatment, 1‐month follow‐up, 3‐month follow‐up, and 6‐month follow‐up assessments.