Skip to main content
. Author manuscript; available in PMC: 2017 Jul 19.
Published in final edited form as: J Head Trauma Rehabil. 2013 Sep-Oct;28(5):341–348. doi: 10.1097/HTR.0b013e31824e1d43

TABLE 3.

Descriptive statistics for baseline and posttest outcome measures and pretest to posttest analysis of covariance resultsa

Domain/measure Control (n = 97) Intervention (n = 104) Test statistics
Baseline, mean (SD) Post, mean (SD) MAdj Baseline, mean (SD) Post, mean (SD) MAdj F P Effect size, d
Skill application 3.57 (0.56) 3.59 (0.60) 3.58 3.52 (0.55) 4.00 (0.51) 4.01 50.32 <.001 1.01
Intentions 3.52 (0.56) 3.58 (0.63) 3.54 3.40 (0.61) 3.82 (0.58) 3.86 24.37 <.001 0.70
Knowledge 0.59 (0.11) 0.61 (0.12) 0.62 0.59 (0.11) 0.70 (0.13) 0.70 22.50 <.001 0.67

Abbreviation: MAdj, adjusted mean.

a

Cohen’s d-statistic associated conventions are as follows: 0.20, small effect; 0.50, medium effect; 0.80, large effect.