The following data comes from a casecontrol study to determine the relationship between meningitis and spasmodic dysphonia

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The following data comes from a casecontrol study to determine the relationship between meningitis and spasmodic dysphonia SD which is a disabling voice disorder 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