| PAIRED GROUP | MEAN DIFFERENCE | P-VALUE |
| E1-C1 | 24.07 | 0.00* |
| E1-E2 | −2.10 | 0.22 |
| E1-C2 | 22.02 | 0.00* |
| C1-E2 | −26.18 | 0.00* |
| C1-C2 | −2.06 | 0.25 |
| E2-C2 | 24.12 | 0.00* |