Table 2: Intention-to-treat results for primary and secondary outcomes in the trial

From: Preventing intrusive memories after trauma via a brief intervention involving Tetris computer game play in the emergency department: a proof-of-concept randomized controlled trial

Continuous outcomeIntervention (n=37)Control (n=34)Analysis
 MeanS.d.MeanS.d.tad95% CI for d
Primary outcome, 1 week
 Number of intrusive memories of traumatic event8.7311.5523.2632.992.80**0.670.18, 1.14
 
Secondary outcomes, 1 week
 Impact of Event Scale—Revised
  Intrusion subscale7.275.2710.707.292.25*0.540.06, 1.01
  Avoidance subscale7.698.118.077.900.260.06−0.41, 0.53
  Hyperarousal subscale5.265.796.987.420.960.23−0.24, 0.70
  Total20.8519.9225.7321.211.110.26−0.21, 0.73
 Post-traumatic Diagnostic Scale11.388.5514.2811.940.830.20−0.27, 0.67
 Hospital Anxiety and Depression Scale7.966.279.838.430.610.15−0.32, 0.61
 
Secondary outcomes, 1 month
 Impact of Event Scale—Revised
  Intrusion subscale5.215.097.016.900.930.22−0.25, 0.69
  Avoidance subscale4.806.214.876.640.010.00−0.47, 0.47
  Hyperarousal subscale4.296.475.286.450.590.14−0.33, 0.61
  Total14.4715.0917.3220.390.460.11−0.36, 0.58
 PDS9.549.2010.2111.260.290.07−0.40, 0.54
 Hospital Anxiety and Depression Scale7.447.208.128.200.180.04−0.42, 0.51
        
Categorical outcome, 1 monthn%n%βbOR95% CI for OR
PDS symptoms consistent with PTSD criteria412.939.70.341.40.28, 7.09
  1. Abbreviations: CI, confidence interval; OR, odds ratio; PDS, Post-traumatic Diagnostic Scale; PTSD, post-traumatic stress disorder.
  2. *P<0.05; **P<0.01.
  3. ad.f.=69.
  4. bLogistic regression, d.f.=1.