title: [Analysis of the joint and a posteriori probability between primary empty sella, its comorbidities and audiovestibular pathology].
abstract: BACKGROUND
  Primary empty sella is a herniation of the sellar diaphragm into the pituitary space. It is an incidental finding and patients may manifest neurological, ophthalmological and/or endocrine disorders. Episodes of vertigo, dizziness, and hearing loss, have been reported.
  
  
  OBJECTIVE
  To determine the conditional probability, as well as the statistical dependency, through the Bayesian analysis in patients with primary empty sella and audiovestibular disorders.
  
  
  METHODS
  Individuals who attended the National Rehabilitation Institute from January 2010 to December 2011, diagnosed with primary empty sella and audiovestibular disorders.
  
  
  METHODS
  An analysis was performed on a sample of 18 patients with a diagnosis of primary empty sella confirmed with magnetic resonance studies and who had signs of vertigo, hearing loss and dizziness.
  
  
  RESULTS
  Of the 18 patients studied, 3 (16.66%) had primary empty sella as the only clinical evidence. In 9 patients (50%) empty sella was associated with vertigo, and 16 patients (88.88%) were diagnosed with hearing loss, with sensorineural hearing loss being the most frequent (77.77%). The intersection between the proportions of primary empty sella with the presence and type of hearing loss was calculated. Thus for sensorineural hearing loss, the calculated ratio was P(AB)=0.6912, and for conductive and mixed hearing loss the value of P(AB)=0.0493 in both cases.
  
  
  CONCLUSIONS
  Bayesian analysis and conditional probability enables the dependence between two or more variables to be calculated. In this study both mathematical models were used to analyse comorbidities and audiovestibular disorders in patients diagnosed with primary empty sella.
authors.affiliation: Audiología, Foniatría y Otoneurología, Centro de Rehabilitación Integral Desarrollo Integral de la Familia Jalisco (Centro de Rehabilitación Integral Jalisco), Guadalajara, Jalisco, México.
authors.forename: Alhelí
authors.initials: A
authors.lastname: Delgado-Hernández
authors.affiliation: Servicio de Neurobiología, Instituto Nacional de Rehabilitación, México, D.F., México.
authors.forename: Antonio
authors.initials: A
authors.lastname: Verduzco-Mendoza
authors.affiliation: Servicio de Audiología, Instituto Nacional de Rehabilitación, México, D.F., México.
authors.forename: Francisco Alfredo
authors.initials: FA
authors.lastname: Luna-Reyes
authors.affiliation: Organismo público descentralizado, Servicios de Salud del Municipio de Zapopan (OPDSSMZ), Zapopan, Jalisco, México.
authors.forename: Salvador
authors.initials: S
authors.lastname: Márquez-Palacios
authors.affiliation: Servicio de Neurobiología, Instituto Nacional de Rehabilitación, México, D.F., México. Electronic address: arch@terra.com.mx.
authors.forename: Emilio
authors.initials: E
authors.lastname: Arch-Tirado
mesh_terms: D000328:Adult; D000368:Aged; D001099:Arachnoid / Q000473:pathology; D001499:Bayes Theorem; D015897:Comorbidity; D003430:Cross-Sectional Studies; D004172:Diplopia / Q000453:epidemiology / Q000209:etiology; D004652:Empty Sella Syndrome / Q000453:epidemiology* / Q000473:pathology; D004700:Endocrine System Diseases / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006261:Headache / Q000453:epidemiology / Q000209:etiology; D034381:Hearing Loss / Q000453:epidemiology*; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D007018:Hypopituitarism / Q000453:epidemiology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D050177:Overweight / Q000453:epidemiology; D010902:Pituitary Gland / Q000473:pathology; D012494:Sampling Studies; D014717:Vertigo / Q000453:epidemiology*
keywords: Aracnoidocele; Audiovestibular disorders; Herniación del diafragma selar; Herniation of the sellar diaphragm; Primary empty sella; Trastorno audiovestibular