title: Headache 22 years after hospitalization for head injury compared with matched community controls.
abstract: OBJECTIVE
  Little information is available on long-term headache following head injury. We compared the prevalence of headache in a cohort with previous hospitalization for head injury and matched controls.
  
  
  METHODS
  A questionnaire about headache was sent to 361 patients who were hospitalized for head injury in 1974-1975 and 722 matched community controls.
  
  
  RESULTS
  In multivariate conditional regression analysis among 192 responding case/control pairs, there was no evidence of higher odds of headache >or=1 day per month (odds ratio, OR 1.04, 95% CI 0.56-1.92, p = 0.90) compared with controls. However, there was a tendency to higher odds of headache >or=1 day per month among female cases than among controls (OR 2.03, 95% CI 0.94-4.39, p = 0.07).
  
  
  CONCLUSIONS
  The study could not show increased odds of headache in a cohort 22 years following hospitalization for head injury, but it is possible that females are more likely to report long-term headache following head injury than matched controls.
authors.affiliation: Norwegian Health Services Research Centre, Oslo, Norway. knut.nestvold@ahus.no
authors.forename: Knut
authors.initials: K
authors.lastname: Nestvold
authors.forename: Knut
authors.initials: K
authors.lastname: Stavem
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D015331:Cohort Studies; D006259:Craniocerebral Trauma / Q000150:complications*; D005260:Female; D006261:Headache / Q000453:epidemiology*; D006304:Health Status; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D015995:Prevalence; D017678:Sex Distribution; D013997:Time Factors