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Table 1 Study population demographic characteristics (n = 82,784)

From: Incidence of adverse events in an integrated US healthcare system: a retrospective observational study of 82,784 surgical hospitalizations

Age (mean) 55.7 years
Age (% distribution)  
  18-24 years 4.1%
  25-44 years 21.6%
  45-64 years 44.2%
  65-84 years 27.5%
  85+ years 2.6%
Gender  
  Female 47.5%
  Male 52.5%
Race  
  White 77.4%
  African American 18.8%
  Asian 0.6%
  Other 1.4%
  Not reported 1.8%
Ethnicity  
  Hispanic 0.8%
  Non-Hispanic 85.7%
  Not reported 13.5%
Insurance type  
  Commercial 27.9%
  Medicare 29.0%
  Medicaid 27.8%
  Other 39.1%
Year of discharge  
  2006 17.6%
  2007 25.0%
  2008 28.5%
  2009 27.9%