Complex sentence: Nausea and vomiting is reported at 9.8% but will vary with the type of anesethetic and procedure, the need for airway support in 6.8%, urinary retention (more common in those over 50 years of age) and hypotension in 2.7%.
Split into simpler sentences: Nausea and vomiting is reported at 9.8% but will vary with the type of anesethetic and procedure. There is a need for airway support in 6.8%, there can be urinary retention (more common in those over 50 years of age) and hypotension in 2.7%.