title: Endolymphatic mastoid shunt: a reevaluation of efficacy.
abstract: OBJECTIVE
  The main goal of this paper was to statistically reevaluate the efficacy of the endolymphatic shunt procedure for Meniere's disease.
  
  
  METHODS
  Thomsen et al (Arch Otolaryngol 1981;107:271-7) reported on the placebo effect in surgery for Meniere's disease in a controlled double-blind study. Thirty patients with typical Meniere's disease in whom medical treatment failed participated in the study. A placebo-controlled blinded surgical study has not since been replicated. We performed a retrospective statistical analysis using data extracted from the published report and reanalyzed it using both the original and new statistical measures and techniques.
  
  
  RESULTS
  The original conclusions drawn by Thomsen et al differed considerably from ours in 5 key areas, including postoperative vertigo, nausea and vomiting, tinnitus, and combined score.
  
  
  CONCLUSIONS
  This analysis strongly supports the effectiveness of the endolymphatic shunt in the management of Meniere's disease and refutes the placebo effect previously proposed.
authors.affiliation: Departments of Otolaryngology and Statistics, Ohio State University, OH, USA.
authors.forename: D B
authors.initials: DB
authors.lastname: Welling
authors.forename: H N
authors.initials: HN
authors.lastname: Nagaraja
mesh_terms: D004311:Double-Blind Method; D004713:Endolymphatic Shunt / Q000706:statistics & numerical data*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008416:Mastoid / Q000601:surgery; D008575:Meniere Disease / Q000175:diagnosis / Q000601:surgery*; D010043:Outcome and Process Assessment, Health Care / Q000706:statistics & numerical data; D015990:Placebo Effect; D011183:Postoperative Complications / Q000175:diagnosis; D012189:Retrospective Studies; D015983:Selection Bias; D016896:Treatment Outcome