Question: Spasmodic dysphonia (SD) is an idiopathic, chronic, and disabling voice disorder. In a case-control study, 150 cases of SD were identified along with 150 controls. Of those with SD, 16 had previously experienced meningitis. Of the controls, 3 had previously experienced meningitis. Set up the appropriate contingency table and calculate and interpret the odds ratio for the relationship between meningitis and SD.