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| Control event rate | Nausea | 95% CI | Vomiting | 95% CI |
| 10% | 31 | 25 to 43 | 25 | 20 to 34 |
| 20% | 16 | 13 to 22 | 13 | 10 to 17 |
| 30% | 10 | 8 to 14 | 8 | 7 to 11 |
| 40% | 8 | 6 to 11 | 6 | 5 to 9 |
| 50% | 6 | 5 to 9 | 5 | 4 to 7 |
| 60% | 5 | 4 to 7 | 4 | 3 to 6 |
| 70% | 4 | 4 to 6 | 4 | 3 to 5 |
| 80% | 4 | 3 to 5 | 3 | 3 to 4 |
| 90% | 3 | 3 to 5 | 3 | 2 to 4 |
CI = confidence interval NNTB = number needed to treat for an additional beneficial outcome PC6= pericardium acupoint PONV = postoperative nausea and vomiting
