No statistically significant difference ( p > 0.05 ) was noted between the two groups for the patients experiencing vomiting ( 33 % vs 41 % , p = 0.389 ) , the mean number of episodes of vomiting ( 0.71 vs 0.88 , p = 0.555 ) , and patients requiring rescue anti-emetics ( 11 % vs 15 % , p = 0.500 ) .