Statistical Analysis
PTSD
REMISSION
Prior to analysis, all data were reviewed for completeness, missingness, and normality assumptions. Multilevel linear models with random effects for participants were used to compare the longitudinal outcomes over the 4 time points between the 2 groups for the CAPS-5 severity and PCL-5 scores, where group and time were fixed effects.While the study was designed to test for group differences between CPT and TCTSY, given the lack of significant differences between the 2 treatments, we followed up our analyses with tests of equivalence to make specific estimates about the effect size we deemed worthwhile to examine.Four clinically relevant end points (CAPS-5) are reported at each time point for the percentage of participants who (1) still met the criteria for a PTSD diagnosis, (2) achieved a clinical response (reduction of CAPS-5 severity scores of ≥10 points), (3) had a loss of diagnosis (≥10-point improvement, no PTSD diagnosis, and CAPS-5 severity score <25), and (4) achieved remission (loss of diagnosis plus CAPS-5 score <12).