Recruitment consisted primarily of mailings to veterans with a diagnosis of PTSD who received VA care, as identified via VA databases. A telephone screen was followed by a 2-hour in-person baseline assessment. Twelve cohorts of 10 to 21 veterans were randomized every 3 to 4 months from September 24, 2014, to February 5, 2018. Figure 1 illustrates recruitment and retention. Participants completed assessments at posttreatment and 3-month and 6-month follow-ups and received $20 to $50 for each assessment.

CPT indicates cognitive processing therapy; LKM, loving-kindness meditation; MBSR, mindfulness-based stress reduction.

Random permuted block randomization (blocks of 2, 4, or 6 individuals) stratified by symptom severity per the Clinician-Administered PTSD Scale (CAPS-5, score ≥37) with masked allocation using sequentially numbered opaque envelopes was performed. The CAPS-5 score was calculated by summing severity scores for the 20 DSM-5 PTSD symptoms. A symptom was considered present if the severity was 2 (moderate) or higher. A PTSD diagnosis required at least 1 symptom for both criteria B and C, at least 2 symptoms for both criteria D and E, and meeting criteria F and G. A staff member not involved in recruitment constructed randomization lists using the random number generator feature of Excel (Microsoft Corp).27

Loving-kindness meditation groups were co-led by 2 community meditation teachers with experience teaching mindfulness and loving-kindness meditation to veterans. A study team member (D.J.K.) with experience teaching loving-kindness meditation provided supervision. CPT groups were co-led by 2 master’s-level therapists who had completed training and certification in CPT through the VA. They received supervision by an experienced CPT national trainer.

Note: The content above has been extracted from a research article, so it may not display correctly.

Please log in to submit your questions online.
Your question will be posted on the Bio-101 website. We will send your questions to the authors of this protocol and Bio-protocol community members who are experienced with this method. you will be informed using the email address associated with your Bio-protocol account.

We use cookies on this site to enhance your user experience. By using our website, you are agreeing to allow the storage of cookies on your computer.