Secondary outcomes
depression, PTSD, anxiety, traumatic
EVENTS, SENSITIVITY
At 3-month follow-up, condition had a significant small-to-moderate effect on PCL-5, with lower scores for PM+/CAU relative to CAU (−6.49; 95% CI −10.150 to −2.834, p=0.0005, Cohen’s Covariate-adjusted LMMs (including all covariates) were consistent with the primary LMM but with overall smaller effect sizes (Moderation analyses of the primary outcome (HSCL-25 total) showed that intervention effects were larger for participants with a higher educational background at 1-week follow-up (p=0.04) and at 3-month follow-up (p=0.02) and for participants who scored above cut-off at baseline for depression (p<0.0001 and p<0.0001, respectively), anxiety (p=0.0009 and p=0.002, respectively) and PTSD (p<0.0001 and p<0.0001, respectively). Participants with more post-migration living difficulties at 3-month follow-up benefited less from PM+ at 3-month follow-up (1-week follow-up: p=0.49; 3-month follow-up: p=0.04). Other variables (ie, gender, age, marital status, work status, traumatic events and post-migration living difficulties at baseline) were not found to be significant effect modifiers.Sensitivity analyses focusing on participants retained at 3-month follow-up and per protocol were consistent with the primary analysis (see 


At 3-month follow-up, 34 PM+/CAU participants had a reliable decrease in HSCL-25 total scores, of whom 2 had a clinically significant change (ie, recovered). In CAU, 22 participants had a reliable decrease in HSCL-25 scores, of whom none recovered. Three months after the intervention, two participants in PM+/CAU versus five participants in CAU had a reliable increase in HSCL-25 scores (ie, deteriorated) (Reliable change index at postassessment and 3-month follow-up for the HSCL-25 (completers only)Recovered=clinical significant reliable change; improved without recovery=no clinical significant reliable change; deteriorated=reliable change with worsening of symptoms; no change=no reliable change.*The Clinical Significant Change cut-off for the HSCL-25 (total scale) was calculated by subtracting 2 SD of the baseline mean for the full sample.†The RCI for the HSCL-25 (total score) was calculated using the baseline SD for the full sample and baseline Cronbach’s α as test–retest reliability coefficientRCI, reliable change index.Four SAEs were reported (two in each group, PM+/CAU: both hospitalised due to medical illness, CAU: one suicide attempt and one hospitalised due to medical illness), but all were assessed as unlikely to be related to the intervention or trial procedures.