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Table 3 Between group comparisons of mean (SD) scores at T0, T1 and T2 in subgroups according to age

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

  Intervention Control group t* p
Preadolescent children (7-11 years)     
IBS-KJ, T0 (total scores) 27.7 (25.2) 24.9 (21.4) 0.43 .69
IBS-KJ, T1 (total scores) 22.2 (22.9) 17.4 (12.2) 0.96 .34
IBS-KJ, T2 (total scores) 14.9 (17.4) 15.0 (10.5) -0.03 .98
DIKJ, T0 (total scores) 8.8 (5.1) 8.4 (5.7) 0.26 .79
DIKJ, T1 (total scores) 5.6 (3.4) 7.8 (4.5) -1.83 .07
DIKJ, T2 (total scores) 4.5 (3.4) 7.6 (5.1) -2.41 .02
CBCL, T0 (T-scores) 53.0 (10.3) 51.1 (8.8) 0.65 .52
CBCL, T1 (T-scores) 49.4 (12.6) 54.7 (10.2) -1.41 .17
CBCL, T2 (T-scores) 45.1 (10.6) 51.3 (7.1) -2.04 .05
Adolescents (12-16 years)     
IBS-KJ, T0 (total scores) 30.6 (22.8) 28.2 (25.2) 0.36 .72
IBS-KJ, T1 (total scores) 21.1 (21.5) 20.0 (19.4) 0.20 .85
IBS-KJ, T2 (total scores) 16.8 (21.1) 12.9 (12.2) 0.76 .45
DIKJ, T0 (total scores) 11.2 (6.6) 11.2 (7.2) 0.03 .98
DIKJ, T1 (total scores) 10.2 (6.6) 9.6 (7.1) 0.32 .75
DIKJ, T2 (total scores) 9.5 (6.6) 7.8 (6.2) 0.92 .36
CBCL, T0 (T-scores) 53.7 (8.5) 49.9 (9.6) 1.36 .18
CBCL, T1 (T-scores) 50.0 (9.6) 44.3 (10.3) 1.78 .08
CBCL, T2 (T-scores) 49.2 (8.4) 45.0 (9.8) 1.42 .16
  1. *Independent two-sample t-test