Correlations between the number of cases involved and knowledge test scores
| Variable | Pearson correlation | P value |
| Part I pretest (n=122) | 0.25 | 0.006 |
| Part II pretest (n=96) | 0.16 | 0.11 |
| Part III pretest (n=88) | 0.37 | <0.001 |
| Part I post-test (n=122) | 0.01 | 0.90 |
| Part II post-test (n=96) | 0.04 | 0.74 |
| Part III post-test (n=88) | 0.05 | 0.66 |