title: Benign paroxysmal positional vertigo and clinical test of sensory interaction and balance in ankylosing spondylitis.
abstract: OBJECTIVE
  To assess the frequency and characteristics of benign paroxysmal positional vertigo (BPPV) and clinical test of sensory interaction and balance (CTSIB) abnormalities in patients with ankylosing spondylitis (AS).
  
  
  METHODS
  A series of consecutive patients that fulfilled the modified New York diagnostic criteria for AS and matched controls were studied.
  
  
  METHODS
  The study was performed at the Otolaryngology Division of a tertiary reference center.
  
  
  METHODS
  Fifty-nine patients with AS (47 men [79.6%]) attending hospital outpatient rheumatology clinics between March and October 2008, and 46 controls (34 men [73.9%]) were studied.
  
  
  METHODS
  Dix-Hallpike and cephalic rotational tests and CTSIB were performed in AS patients and age-, sex-, and ethnically frequency-matched controls.
  
  
  METHODS
  Type and frequency of BPPV and CTSIB conditions were assessed.
  
  
  RESULTS
  BPPV was diagnosed in 6 patients (10.1%) with AS and in 2 (4.3%) of the controls (p = 0.24). Abnormal caloric test was more commonly observed in patients with AS (n = 15 [25.4%]) than the controls (n = 0) (p < 0.001). Increased frequency of abnormal CTSIB also was observed in patients (19/59 [32%]) compared with the controls (3 [6.5%]) (odds ratio, 6.81 [95% confidence interval, 1.77-38.0]; p = 0.001). Among the abnormal CTSIB patterns, the vestibular loss was the most commonly observed in patients with AS (15/59 [25.4%]).
  
  
  CONCLUSIONS
  The present study shows an increased frequency of abnormal postural control in CTSIB test of vestibular origin in patients with AS.
authors.affiliation: Otolaryngology Division, Hospital Xeral-Calde, Lugo.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Amor-Dorado
authors.forename: María P
authors.initials: MP
authors.lastname: Barreira-Fernández
authors.forename: Tomas R
authors.initials: TR
authors.lastname: Vázquez-Rodríguez
authors.forename: José A
authors.initials: JA
authors.lastname: Miranda-Filloy
authors.forename: Javier
authors.initials: J
authors.lastname: Llorca
authors.forename: Miguel A
authors.initials: MA
authors.lastname: González-Gay
mesh_terms: D000328:Adult; D065635:Benign Paroxysmal Positional Vertigo; D002150:Caloric Tests; D005133:Eye Movements / Q000502:physiology; D005260:Female; D019416:Head Movements / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009760:Nystagmus, Physiologic / Q000502:physiology; D004856:Postural Balance / Q000502:physiology*; D012399:Rotation; D012665:Semicircular Canals / Q000503:physiopathology; D013167:Spondylitis, Ankylosing / Q000503:physiopathology*; D014717:Vertigo / Q000503:physiopathology; D014724:Vestibular Function Tests; D055815:Young Adult