title: Anxiety-related visits to Ontario physicians following September 11, 2001.
abstract: OBJECTIVE
  To determine whether the climate of increased anxiety following the terrorist attacks of September 11, 2001, and the subsequent anthrax cases led to increased anxiety-related physician visits.
  
  
  METHODS
  We undertook a retrospective, population-based study of all Ontario residents. We identified physician visits using Ontario's universal health care insurance program. Interventional autoregressive integrated moving average (ARIMA) time series models were used to examine the impact of the terrorist attacks and anthrax infections on the rate of anxiety-related physician visits.
  
  
  RESULTS
  Neither the terrorist attacks of September 11 (P > or = 0.40) nor the anthrax infections in October and November (P > or = 0.14) had a statistically significant impact on the rate of anxiety-related visits to physicians.
  
  
  CONCLUSIONS
  The climate of heightened anxiety did not result in increased demand for mental health services.
authors.affiliation: Institute for Clinical Evaluative Sciences, Department of Public Health Sciences, University of Toronto, Toronto, Ontario. peter.austin@ices.on.ca
authors.forename: Peter C
authors.initials: PC
authors.lastname: Austin
authors.forename: Muhammad M
authors.initials: MM
authors.lastname: Mamdani
authors.forename: Benjamin T
authors.initials: BT
authors.lastname: Chan
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Lin
mesh_terms: D001008:Anxiety Disorders / Q000453:epidemiology* / Q000628:therapy*; D006801:Humans; D008605:Mental Health Services / Q000706:statistics & numerical data*; D009819:Office Visits / Q000706:statistics & numerical data*; D023481:Terrorism