The author compared the average number of daily outpatient visits during the 19 working days before and after September 11 in different clinical subgroups and geographic locations (excluding weekends, holidays, and September 11 itself). Although the events of September 11 were profoundly traumatic for those directly involved and clearly distressing for others, they are not necessarily medically significant. The author found no substantial short-term change in the use of services, even among more vulnerable patients with mental illness or post-traumatic stress disorder.
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