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Comparison of knowledge between pre and posttests for the experimental and control groups (N=76).
| Groupa | Pretest score | Posttest score | MDb | Paired t test (df) | P value |
| Control group | 7.03 (1.61) | 8.29 (1.22) | 1.26 | 4.75 (37) | <.001 |
| Experimental group | 7.08 (1.53) | 8.61 (1.79) | 1.52 | 3.99 (37) | .001 |
aComparison between the groups: t74=0.81, P=.42.
bMD: mean difference.
