Table 3.

Results of the meta-analyses of dropout.

	Number of studies	Mean % drop out (95% CI)	I2 (%)
1. CBT-T (not based on a specific model)	25	13 (9–18)	64.41
2. Brief Eclectic Psychotherapy	3	17 (0–51)	90.40
3. Cognitive Processing Therapy (CPT)	8	30 (22–39)	75.15
4. Cognitive Therapy (CT)	6	9 (1–23)	82.72
5. Narrative Exposure Therapy	11	12 (3–26)	85.59
6. Prolonged Exposure (PE)	22	22 (16–28)	72.56
7. Reconsolidation of Traumatic Memories (RTM)	1	1 (0–8)	0.00
8. Virtual Reality Exposure (VRE)	5	18 (3–38)	76.32
9. Eye Movement Desensitization and Reprocessing (EMDR)	21	18 (12–24)	62.13
10. CBT without a trauma focus	9	14 (7–23)	61.96
11. Present Centred Therapy (PCT)	6	20 (13–28)	40.85
12. Supportive Counselling	9	15 (3–32)	87.84
13. Observed and Experiential Integration (OEI)	1	0	Not applicable
14. Interpersonal Psychotherapy (IPT)	1	15 (6–30)	Not applicable
15. Psychodynamic Psychotherapy	1	14	Not applicable
16. REM Desensitization	1	38	Not applicable
17. Emotional Freedom Technique (EFT)	1	39	Not applicable
18. Dialogical Exposure Therapy (DET)	1	12	Not applicable
19. Internet-based CBT	3	16 (8–26)	32.12
20. Relaxation Training	8	10 (3–19)	56.80
21. Group CBT with a Trauma Focus (group CBT-T)	9	24 (16–33)	76.29
22. Group Present Centred Therapy (PCT)	3	14 (11–18)	0.00
23. Group and Individual CBT-T	1	22	Not applicable
24. Group Stabilizing Treatment	1	18	Not applicable
25. Group Interpersonal Psychotherapy	1	38	Not applicable
26. Group Supportive Counselling	1	3	Not applicable
27. Couples CBT-T	2	22 (11–36)	0.00
28. Psychoeducation	3	1 (0–7)	0.00
29. Couples Psychoeducation	3	12 (3–25)	64.00
30. Internet-based psychoeducation	1	7	Not applicable
31. Waitlist	53	11 (8–15)	65.43
32. Treatment usual	14	13 (7–19)	61.37
33. Minimal attention/symptom monitoring	8	13 (2–32)	92.30