17 studies on the incidence of PONV after general anesthesia maintained with propofol vs volatile agents, propofol was significantly lower (median incidence 13.3% vs 25%). 5 Although total intravenous anesthesia (TIVA) may have a lower incidence, PONV can still occur. Therefore, intervention to further reduce PONV risk may be needed even in TIVA cases. Although reports have identified patient-, surgery-, and anesthesia-specific factors related to PONV, 3 , 4 , 7 – 10 none have focused only on TIVA cases. The purpose of this study was to determine whether the