highly significantP = 0.40
The use of a volatile anesthesic was highly significant, with an adjusted OR (CI) of 3.45 (2.22–5.26) from 0 to 2 h after anesthesia, but this factor was unrelated to PONV 2–24 h and 24–48 h after anesthesia ( P = 0.40, P = 0.73).