title: The impact of a repealed motorcycle helmet law in Miami-Dade County.
abstract: OBJECTIVE
  To study the impact of helmet nonuse in motorcycle crashes after the repeal of a mandatory helmet law in the state of Florida.
  
  
  METHODS
  We prospectively studied all patients evaluated at the University of Miami/Jackson Memorial Medical Center from July 1, 2000, through December 31, 2000, involved in motorcycle crashes, and compared them with those seen during the same time period the year before the helmet law change.
  
  
  RESULTS
  In 1999, before the repeal of the helmet law, there were 52 cases evaluated at our center compared with 94 after the law change. Helmet usage decreased from 1999 (83%) to 2000 (56%). The number of brain injuries (Abbreviated Injury Scale score > or = 2) during this same time period increased from 18 to 35, and the number of fatalities from 2 to 8.
  
  
  CONCLUSIONS
  The repeal of a motorcycle helmet law significantly increased the number and severity of brain injuries admitted to our trauma center.
authors.affiliation: Department of Neurological Surgery, University of Miami School of Medicine, Miami, Florida, USA.
authors.forename: Gillian A
authors.initials: GA
authors.lastname: Hotz
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Cohn
authors.forename: Charlie
authors.initials: C
authors.lastname: Popkin
authors.forename: Peter
authors.initials: P
authors.lastname: Ekeh
authors.forename: Robert
authors.initials: R
authors.lastname: Duncan
authors.forename: E William
authors.initials: EW
authors.lastname: Johnson
authors.forename: Frank
authors.initials: F
authors.lastname: Pernas
authors.forename: Joseph
authors.initials: J
authors.lastname: Selem
mesh_terms: D000063:Accidents, Traffic / Q000331:legislation & jurisprudence* / Q000401:mortality*; D000704:Analysis of Variance; D001930:Brain Injuries / Q000453:epidemiology* / Q000517:prevention & control; D016009:Chi-Square Distribution; D005431:Florida / Q000453:epidemiology; D006260:Head Protective Devices / Q000706:statistics & numerical data*; D006801:Humans; D015601:Injury Severity Score; D009049:Motorcycles; D011446:Prospective Studies; D012189:Retrospective Studies