| Paired Group | Mean Difference | P-Value |
| E1-C1 | 21.40 | 0.00* |
| E1-E2 | −3.57 | 0.21 |
| E1-C2 | 20.24 | 0.00* |
| C1-E2 | −24.97 | 0.00* |
| C1-C2 | −1.16 | 0.94 |
| E2-C2 | 23.81 | 0.00* |