According to a recent meta-analysis on patients undergoing general anesthesia, which of the following findings was most likely an effect of intravenous (I.V.) midazolam used either pre- or intraoperatively?

Postoperative nausea and vomiting (PONV) is one of the most common problems associated with general anesthesia, with anywhere from 10 percent to more than 80 percent of patients experiencing PONV. While PONV is certainly unpleasant and difficult for patients, it can also result in significant morbidity and increased costs. Midazolam is a benzodiazepine frequently used as an anxiolytic in the perioperative period that has been noted for its potential in preventing PONV. The goal of a recent meta-analysis was to evaluate the efficacy of I.V. midazolam for the prevention of PONV when given either pre- or intraoperatively in adult patients undergoing general anesthesia.

Using Cochrane Handbook recommendations for the performance...

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