While I have no information about the incidence of reflux/aspiration in people who chew gum, I know of 2 cases where chewing gum was found incidentally in children after induction. In one case, the gum was found during intubation and removed, but in the second case the chewing gum was not seen. It was only discovered after extubation when it caused a glottic obstruction and the child needed to be re-intubated and was found at laryngoscopy.