title: Sudden sensorineural hearing loss associated with tension-type headache: a population-based study.
abstract: OBJECTIVE
  This study explored the relationship between sudden sensorineural hearing loss (SSNHL) and prior tension-type headache (TTH) in a large nationwide population-based data set in Taiwan.
  
  
  METHODS
  In this case-controlled study in Taiwan, participants with SSNHL (n = 4,683) were identified, and controls (n = 18,732) were randomly selected from the National Health Insurance database. Cases of TTH were identified by having been diagnosed as TTH prior to the index date of SSNHL diagnosis. A conditional logistic regression model was used to estimate the adjusted odds ratio (OR) and 95% confidence intervals (CI) for the association of sudden deafness with TTH among the sampled patients.
  
  
  RESULTS
  Among the 23,415 patients, 2.5% (600/23,415) had TTH diagnoses prior to the index date; TTH was diagnosed in 4.5% (209/4,683) of the SSNHL group and 2.1% (391/18,732) of the control group. After adjusting for sociodemographic characteristics and comorbid medical disorders, we found that patients with SSNHL were more likely to have had a previous TTH than controls (OR, 1.86; 95% CI, 1.54-2.24; p < 0.01).
  
  
  CONCLUSIONS
  Both male and female patients with SSNHL had a higher proportion of prior TTH than controls without SSNHL.
authors.forename: Po-Chou
authors.initials: PC
authors.lastname: Hsiao
authors.forename: Hsiao-Yun
authors.initials: HY
authors.lastname: Hu
authors.forename: Tzong-Hann
authors.initials: TH
authors.lastname: Yang
authors.forename: Fei-Peng
authors.initials: FP
authors.lastname: Lee
authors.forename: Hung-Meng
authors.initials: HM
authors.lastname: Huang
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D015331:Cohort Studies; D015897:Comorbidity; D003327:Coronary Disease / Q000453:epidemiology; D003920:Diabetes Mellitus / Q000453:epidemiology; D005260:Female; D003639:Hearing Loss, Sudden / Q000453:epidemiology*; D006801:Humans; D006949:Hyperlipidemias / Q000453:epidemiology; D006973:Hypertension / Q000453:epidemiology; D007182:Income; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012189:Retrospective Studies; D012307:Risk Factors; D013624:Taiwan / Q000453:epidemiology; D018781:Tension-Type Headache / Q000453:epidemiology*; D055815:Young Adult