Table 1.
Differences between Control and PTSD Groups in Demographic and Clinical Variables, and Basic Memory Performance.
| Control | PTSD | Test statistic | |
|---|---|---|---|
| N | 13 | 11 | |
| Sex (female) | 3 | 2 |
OR = 1.350, P = 0.769 ϕ = 0.060, 95% CI = [0.18, 10.01] |
| Age (years) | 20.83 (6.58) |
23.41 (7.50) |
U = 67.5, P = 0.817 d = 0.095, 95% CI = [−5.50, 2.75] |
| Trauma load (no. of different traumatic event types) | 4.00 (4.00) |
6.00 (4.00) |
U = 46.5, P = 0.141 d = 0.619, 95% CI = [−3.00, 0.00] |
| PDS symptom severity (sum score) | 6.00 (7.50) |
23.00 (20.00) |
U = 6.5, P < 0.001* d = 2.404, 95% CI = [−29.00, −10.00] |
| PDS subscale B | 1.00 (2.50) |
6.00 (10.00) |
U = 15.0, P = 0.001* d = 1.796, 95% CI = [−10.00, −2.00] |
| WBSI | 50.00 (23.00) |
62.00 (17.00) |
U = 29.0, P = 0.014* d = 1.163, 95% CI = [−23.60, −4.20] |
| BDI-II cutoff ≥ 17 | 7 | 9 |
OR = 0.259, P = 0.159 ϕ = 0.296, 95% CI = [0.04, 1.70] |
| Learning rate (%) | 83.19 (6.91) |
79.80 (6.06) |
t(22) = 1.268, P = 0.218 d = 0.519, 95% CI = [−2.16, 8.94] |
| False alarms (%) | 5.29 (4.78) |
14.58 (13.73) |
t(13)† = 2.139, P = 0.054 d = 0.939, 95% CI = [−18.76, 0.168] |
Number of observed cases or M (SD) for normally distributed and Mdn (interquartile range) for non-normally distributed variables. *Significant result (P < 0.05); †Corrected for unequal variances as indicated by significant Levene’s Test. Confidence intervals are given for the difference of means (t-tests) or medians (Mann-Whitney U-tests) together with Cohen’s d, and for odd’s ratio (OR) together with ϕ-coefficients.