| Comparison | N sess | N sig | % diff | 
| PG1-PG2 | 28 | 9 | 32% | 
| PG1-YG1 | 44 | 22 | 50% | 
| PG1-YG2 | 32 | 24 | 75% | 
| PG2-YG1 | 28 | 19 | 68% | 
| PG2-YG2 | 28 | 19 | 68% | 
| YG1-YG2 | 32 | 6 | 19% |