Table 11_2_2-1 2008 National Healthcare Quality and Disparities ReportsThe National Healthcare Quality Report (NHQR) is a comprehensive national overview of quality of health care in the United States. It is organized around four dimensions of quality of care: effectiveness, patient safety, timeliness, and patient centeredness. Table 11_2_2.1Emergency department visits where patients left without being seen, United States, 1997–1998 and 2005–2006Population group2005–20061997–1998PercentSEPercentSETotal2.030.111.210.10Age0–172.190.221.050.1318–442.610.171.620.1645–641.630.151.150.1865 and over0.650.10**RaceaWhite only1.790.120.990.09Black only2.850.232.060.25Asian only1.420.31**AI/AN****Multiple races**NANAGenderMale2.000.131.240.13Female2.050.141.190.11Payment sourcePrivate1.550.130.900.10Medicare0.780.12**Medicaid1.940.151.580.20Uninsured3.090.271.980.22LocationMSA2.250.131.390.12Non-MSA0.760.130.650.13a Race excludes multiple-race category in 1997–1998 data.* - Data do not meet the criteria for statistical reliability, data quality, or confidentiality.Key: AI/AN: American Indian or Alaska Native; MSA: metropolitan statistical area; SE: standard error.Source: Centers for Disease Control and Prevention, National Center for Health Statistics, National Hospital Ambulatory Medical Care Survey. Current as of September 2009 Internet Citation: Table 11_2_2-1: 2008 National Healthcare Quality and Disparities Reports. September 2009. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/nhqrdr/nhqrdr08/11_timeliness/T11_2_2-1.html