Table 3.
Incidence of the postoperative nausea and vomiting in PACU and ward
| Early oral hydration group (n=488) | Delayed oral hydration group (n=495) | P | |
|---|---|---|---|
| PACU Vomiting within 20 minutes of first drink (EOH) or of recovery from anesthesia (DOH) | 1 (0.2) | 2 (0.4) | 1.0 |
| Ward 4 h post anesthesia Nausea before drinking | 12 (2.5) | 13 (2.6) | 1.0 |
| Vomiting before drinking | 7 (1.4) | 5 (1.0) | 0.58 |
| Nausea after drinking (%) | 37 (7.6) | 32 (6.5) | 0.53 |
| Vomiting after drinking (%) | 22 (4.5) | 20 (4.1) | 0.75 |
*Scales were administered just after recovery from anesthesia; the first drink was then administered to the EOH group only, and the scales were administered to both groups again 20 minutes later.