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Table 3 Descriptive analyses for PTSD for intent to treat sample (N = 34) (estimated values)

From: Trauma-focused treatment for posttraumatic stress disorder combined with CBT for severe substance use disorder: a randomized controlled trial

Variable (primary outcome measures) TAU + SWT (A) (N = 19)   TAU (B) (N = 15)   GLM Partial η 2 Contrast Partial η 2 GLM Partial η 2 GLM partial bη 2
  pre mid post fu pre mid post fu Time Time 1 pre-mid 1 pre-mid condition condition Time * condition Time * condition
2 mid-post 2 mid-post
3 post-fu 3 post-fu
PDS total: M (SD) 30.4 (9.7) 28.2 (9.0) 17.6 (12.0) 23.5 (14.8) 28.3 (10.7) 26.5 (9.8) 24.3 (9.1) 21.7 (9.4) A + B ** 0.166 1 A ns B ns A 0.036 B 0.037 ns 0.000 ns 0.059
2 A * B ns A 0.341 B 0.040
3 A ns B ns A 0.143 B 0.062
          McN χ 2 OR 3    Fisher t 4 φ 5   
SCID (PTSD) n (%)                 
PTSD 19 (100) - 9.8 (51.8) - 15 (100) - 13.2 (88.0) - A* 0    - −0.390 - -
B 0
Partial & Full-blown
Partial PTSD 10 (52.6) - 2.8 (14.7) - 3 (20.0) - 2.4 (16.0) - A* 0.1    - −0.028 - -
B 0.8
Full-blown PTSD 9 (47.4) - 7 (36.8) - 12 (80.0) - 10.8 (72.0) - A 0.7    - −0.353 - -
          B 0.8       
  1. Note. PTSD Posttraumatic Stress Disorder, TAU Treatment as usual, SWT Structured Writing Therapy, PDS Posttraumatic Diagnostic Scale, SCID Structured Clinical Interview of DSM IV, PTSD Posttraumatic stress disorder, A = TAU + SWT. B = TAU. pre pre-treatment, mid mid-treatment, post post-treatment, Fu follow up. McN χ2 = McNemars χ2. OR odds ratio, Pl Con planned contrasts.
  2. *p <0.05 **p < 0.001. t trend, ns not significant.
  3. 3OR = increase of cases/ decrease of cases.
  4. 4Overall Fisher’s excact test was calculated for PTSD diagnosis (p = 0.06).
  5. φ 5 Phi (measure of effectsize).