Table 3.
Within- and Between-Condition Comparisons of Outcomes from Baseline to 2-month and 4-month Follow-ups
| Brief NET Condition (n = 41) |
Control Condition (n = 22) |
Condition × Time Interaction | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Baseline | 2-month | 4-month | Baseline | 2-month | 4-month | 2-month | 4-month | |||||
| Outcome measure |
M (SD) |
M (SD) |
d |
M (SD) |
d |
M (SD) |
M (SD) |
d |
M (SD) |
d | ES | ES |
| Posttraumatic growth | 45.78 (23.85) | 51.22 (25.40) | 0.23 | 58.18 (22.44) | 0.52** | 47.68 (22.66) | 41.86 (21.73) | -0.26 | 39.58 (13.53) | -0.36 | 0.48* | 0.83*** |
| General well-being | 4.93 (5.02) | 8.18 (6.27) | 0.65** | 9.55 (6.76) | 0.92*** | 6.05 (4.46) | 5.95 (5.50) | -0.02 | 7.12 (4.91) | 0.24 | 0.56* | 0.54* |
| Trauma symptoms | 2.79 (0.49) | 2.60 (0.66) | -0.39** | 2.55 (0.66) | -0.50** | 2.76 (0.44) | 2.76 (0.48) | -0.01 | 2.65 (0.52) | -0.26 | -0.48* | -0.32 |
| Depressive symptoms | 33.91 (10.46) | 27.46 (13.54) | -0.62*** | 25.08 (13.27) | -0.84*** | 33.45 (11.45) | 31.45 (12.08) | -0.17 | 27.38 (10.85) | -0.53** | -0.46* | -0.27 |
| Somatic symptoms | 19.40 (6.12) | 16.16 (6.24) | -0.53** | 15.90 (6.51) | -0.57*** | 19.40 (6.63) | 17.97 (5.71) | -0.22 | 16.71 (4.76) | -0.41 | -0.32 | -0.13 |
Note. N = 63. d is the within-condition effect size ((post M – baseline M) / baseline SD).
ES is the between-condition effect size ((Brief NET follow-up M – baseline M) – (control follow-up M – baseline M)) / SD of the pooled change scores.
*
p < .05.
**
p < .01.
***
p < .001.
Tests were 2-tailed for within-condition effects and 1-tailed for condition × time interactions, given the directional hypotheses.
The F-tests of the condition × time interactions had degrees of freedom of 1,61.
The data presented, and analyses conducted, are for the full sample of 63 participants; missing follow-up data were replaced with multiple imputation.