9. There is no difference in the incidence of PONV at 4h, RR 0.97 95% CI 0.52-1.79 P: 0.91, more between 4 and 24h RR 0.99 95% CI 0.64-1.53 P: 0.96.
No hay diferencia en la incidencia de NVPO a las 4h RR: 0,97; IC95%: 0,52 a 1,79; p=0,91, ni entre las 4 y 24h RR: 0,99; IC95%: 0,64 a 1,53; p=0,96.