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Table 4 Analysis of covariance of T2 scores as a function of intervention condition and age group, with T0 scores as covariate

From: Effectiveness of a single-session early psychological intervention for children after road traffic accidents: a randomised controlled trial

Source

df

MS

F

p

Posttraumatic stress symptoms: IBS-KJ, T2

    

IBS-KJ, T0 (covariate)

1

7256.6

40.83

<.001

Intervention

1

19.2

0.11

.74

Age group

1

39.9

0.22

.64

Intervention × age group

1

104.7

0.59

.45

Error

94

177.7

  

Depressive symptoms: DIKJ, T2

    

DIKJ, T0 (covariate)

1

1153.3

61.82

<.001

Intervention

1

16.2

0.87

.35

Age group

1

28.5

1.53

.22

Intervention × age group

1

151.2

8.11

.01

Error

94

18.7

  

Behavioural problems: CBCL, T2

    

CBCL, T0 (covariate)

1

2637.6

60.3

<.001

Intervention

1

148.3

3.39

.07

Age group

1

2.8

0.06

.80

Intervention × age group

1

229.8

5.25

.03

Error

67

43.7

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