| VAS | Experimental group | Control group | ||
| N | % | N | % | |
| 0 - 10 | 20 | 80.0 | 5 | 20.0 |
| 20 - 30 | 1 | 4.0 | 13 | 52.0 |
| 40 - 50 | 3 | 12.0 | 6 | 24.0 |
| 60 - 70 | 1 | 4.0 | 1 | 4.0 |
| Total | 25 | 100.0 | 25 | 100.0 |
| Mean | 10.8 | 26.4 | ||
| DS | 16.6 | 16.3 | ||
| Min | 0 | 0 | ||
| Max | 60 | 60 | ||
| Mann Whitney test | U’ = 485.5, P = 0.0008 | |||