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Table 2 Descriptives and test statistics between measurement time points for each exposure session

From: Efficacy of exposure in group settings for youth with posttraumatic stress symptoms

Session T1 T2 T3 T1-T2 T1-T3 T2-T3 Total
M (SD) Md M (SD) Md M (SD) Md Z p d Z p d Z p d Χ2(2) p
Session 1 (n = 46) 4.10 (2.85) 4 4.33 (2.48) 5 3.68 (2.47) 3 − 0.94 0.345 0.1 − 1.97 0.048 0.27 − 2.98 0.003 0.39 13.08  ≤ .001
Session 2a (n = 41) 3.34 (2.83) 3 6.22 (2.26) 7 4.0 (2.52) 4.5 − 5.25  ≤ .001 0.65 − 1.99 0.047 0.23 − 4.95  ≤ .001 0.53 51.25  ≤ .001
Session 3a (n = 40) 3.35 (2.58) 3 7.92 (2.18) 9 4.3 (2.34) 4.5 − 5.39  ≤ .001 0.87 − 1.74 0.083 0.33 − 5.53  ≤ .001 0.7 63.88  ≤ .001
Session 4a (n = 35) 3.51 (3.01) 3 3.49 (2.41) 4 2.54 (2.57) 2 − 0.03 0.977 0.01 − 3.23  ≤ 0.001 0.38 − 2.37 0.018 0.35 15.61  ≤ .001
Session 5a (n = 36) 2.86 (2.29) 3 4.36 (2.13) 4 2.67 (2.10) 2 − 3.96  ≤ .001 0.55 − 0.72 0.472 0.07 − 5.01  ≤ .001 0.45 43.39  ≤ .001
Session 6 (n = 36) 2.25 (2.05) 2.5 2.50 (2.26) 2 1.36 (1.38) 1 − 1.21 0.226 0.15 − 3.42 0.001 0.4 − 4.19 0.001 0.4 23.76  ≤ .001
  1. T1 = at the beginning of the session, T2 = during the session; T3 = at the end of the session
  2. aexposure sessions