Frequency distribution of injected pain
| Injection pain | Group A | Group B | Total |
| 0.0 | 1 | 2 | 3 |
| 3.2% | 6.9% | 5.0% | |
| 1.0 | 2 | 3 | 5 |
| 6.5% | 10.3% | 8.3% | |
| 2.0 | 4 | 3 | 7 |
| 12.9% | 10.3% | 11.7% | |
| 3.0 | 2 | 3 | 5 |
| 6.5% | 10.3% | 8.3% | |
| 4.0 | 3 | 0 | 3 |
| 9.7% | 0% | 5.0% | |
| 5.0 | 8 | 5 | 13 |
| 25.8% | 17.2% | 21.7% | |
| 6.0 | 3 | 3 | 6 |
| 9.7% | 10.3% | 10% | |
| 7.0 | 3 | 1 | 4 |
| 9.7% | 3.4% | 6.7% | |
| 8.0 | 3 | 6 | 9 |
| 9.7% | 20.7% | 15.0% | |
| 9.0 | 1 | 2 | 3 |
| 3.2% | 6.9% | 5.0% | |
| 10.0 | 1 | 1 | 2 |
| 3.2% | 3.4% | 3.3% | |
| Total | 31 | 29 | 60 |
| 51.7% | 48.3% |