Table 1.
Interapy studies
| Author | Year | Sample | Sample size | # Sessions/mins treatment |
PTSD Outcome measure |
% Dropout | Mean (SD) |
Effect size (Hedge’s g) |
||
|---|---|---|---|---|---|---|---|---|---|---|
| Pre | Post/follow-up | Within | Between | |||||||
| Knaevelsrud and Maercker |
2007 | Probable PTSD |
N = 96 Interapy n = 49 WL n = 47 |
10 sessions of 45 min |
IES-R (Intrusions) | Interapy = 16 % WL = 2% |
Interapy = 23 (6.4) WL = 23.3 (7.89) |
Interapy = 12.3 (8.7) WL = 20.7 (9.2) |
1.40 .31 |
.93 |
| van Emmerik et al. | 2008 | Full PTSD | N = 125 SWT n = 44 CBT n = 41 WL n = 40 |
3 sessions of 90 min |
IES-R (Total) | Missing dataa | SWT = 47.87 (13.82) CBT = 46.40 (12.32) WL = 49.14 (14.66) |
SWT = 34.32 (22.58) CBT = 32.00 (20.32) WL = 45.66 (13.65) |
.72 .86 .25 |
SWT vs. CBT = .11 (SWT & CBT) vs. WL = .69 |
WL waitlist, IES-R impact of events scale-revised, CBT cognitive behavior therapy, SWT structured writing therapy
a
Data not available; not reported in the publication and unable to obtain from corresponding author