Over the 24 postoperative hours, the incidence of PONV was 34.7% in the PO group and 72% in the EO group, (p<0.0001);
the incidence of nausea was 40.9% in the PO group and 76.9% in the EO group, (p=0.0009); and
the proportion of rescue requirements was 34.7% in the PO group and 72% in the EO group, (p<0.0001).
Ondansetron as first-rescue anti-emetic was used in 34.7% of the PO group and 72% of the EO group, (p<0.0001).
Metoclopramide as second-rescue anti-emetic was used in 9.3% of the PO group and 29.3% of the EO group, (p=0.0019).
Promethazine as third-rescue anti-emetic was used in 2.7% of the PO group and 13.3% of the EO group, (p=0.0351).
The FTT was 21.6 (+/- 4.1) minutes in the PO group and 28.2 (+/- 5.3) minutes in the EO group, (p<0.0001).
PACU stay was 126.5 (+/- 13.9) minutes in the PO group and 141.1 (+/- 30.6) minutes in the EO group, (p=0.0002).
The NNP/NNT PONV was 2 in the PO group and 9 in the EO group.
The NNS was 1.6 in the PO group and 4 in the EO group.
The parental satisfaction score was 8.2 (+/- 1.8) in the PO group and 6.8 (+/- 1.7) in the EO group, (p<0.0001).