Table 2

Psychological test results for the treatment group (Interapy) and the waiting list control group (WLC) at pre-treatment and post-treatment and 3-months follow-up: Intention-to-Treat Analysis.

Groups × Pre-Post Effect

Pre-test

Post-test

Follow-up

Effectsize Pre to Post

Effectsize Pre to 3-months

F

p


M

SD

M

SD

M

SD


Intrusions IES-R

Treatment

23.0a

(6.4)

12.3b

(8.7)

12.7b

(8.1)

1.40

1.41

F = 21.52

p < .001

Control

23.3a

(7.89)

20.7b

(9.2)

-

-

0.30

Aoidance IES-R

Treatment

19.9a

(9.8)

10.1b

(10.2)

9.7b

(9.9)

.98

1.0

F = 10.00

p < .005

Control

19.0a

(10.0)

16.0b

(10.5)

-

-

0.29

Hyperarousal IES-R

Treatment

22.1a

(6.5)

11.0b

(9.0)

10.0b

(8.5)

1.41

1.60

F = 25.49

p < .001

Control

19.1a

(9.5)

16.5b

(9.9)

0.27

Depression BSI

Treatment

10.1a

(4.0)

5.3b

(4.3)

4.9b

(4.2)

1.16

1.27

F = 7.38

p < .05

Control

9.4a

4.7

7.2b

4.9

.46

Anxiety BSI

Treatment

9.1a

(3.4)

5.2b

(3.8)

4.7b

(3.8)

1.08

1.22

F = 10.73

p < .001

Control

7.5a

(4.7)

6.5a

(4.7)

.21

Mental Health SF-12

Treatment

34.6a

(5.6)

39.7b

(7.4)

40.0b

(7.6)

.77

.80

F = 5.95

p < .05

Control

35.5a

(6.5)

36.9a

(6.2)

.22

Physical Health SF-12

Treatment

46.7a

(5.2)

47.2a

(5.2 =

47.9a

(5.0)

.10

.24

F = .001

n.s.

Control

46.0a

(5.1)

46.6a

(5.2)

.17


a,b Means within a column which share a superscripts do not differ at p = 0.05 Note: Treatment group: n = 49, control group: n = 46

Knaevelsrud and Maercker BMC Psychiatry 2007 7:13   doi:10.1186/1471-244X-7-13

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