Treatment conditions
traumatic
SESSION
All participants received exposure-based interventions. In the PE condition, patients received 16 treatment sessions of each 90 min (1440 min in total). Sessions included imaginal exposure involving repeated and systematic recounting of the most distressing traumatic memories and exposure in vivo involving approaching trauma-related stimuli. Patients listened to audiotapes of the imaginal exposure between sessions and practised approaching trauma-related stimuli. In the i-PE condition, participants received 14 sessions of 90 min (1260 min in total). i-PE was delivered in three sessions per week for 4 weeks followed by two booster sessions. Session content was similar to the standard PE condition, but the treatment was delivered by two alternating therapists. In the STAIR + PE condition, patients received eight sessions of 60 min skills training followed by eight PE sessions of 90 min (1200 min in total), which was delivered in 16 weekly sessions by one therapist (Cloitre et al., 