| Antiemetic Regimen | PONV | p-Value | ||
| No | Yes | Total | ||
| 5HT3 | 84.6% | 15.4% | 1412 | <0.0001 |
| Phenothiazine | 90.6% | 9.4% | 276 | |
| Both | 92.3% | 7.7% | 2555 | |
| Neither | 87.9% | 12.1% | 149 | |
| Total | 89.8% | 10.2% | 4392 | |