Table 13_2_2-1 2009 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 13_2_2.1Emergency department visits where patients left without being seen, United States, 1997–1998 and 2006–2007 2006–20071997–1998Population groupPercentSEPercentSETotal 1.840.101.210.10Age0–171.930.191.050.1318–442.320.161.620.1645–641.680.161.150.1865 and over0.590.09DSUDSURaceaWhite only1.010.160.990.09Black only2.460.512.060.25Asian onlyDSUDSUDSUDSUAI/ANDSUDSUDSUDSUMultiple racesDSUDSUNANAGenderMale1.730.111.240.13Female1.940.121.190.11Payment sourcePrivate1.320.120.900.10Medicare0.640.10DSUDSUMedicaid1.830.131.580.20Uninsured2.900.281.980.22LocationMSA2.020.121.390.12Non-MSA0.840.150.650.13a Race excludes multiple-race category in 1997–1998 data.DSU - Data do not meet the criteria for statistical reliability, data quality, or confidentiality.NA - Not applicable.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 March 2010 Internet Citation: Table 13_2_2-1: 2009 National Healthcare Quality and Disparities Reports. March 2010. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/nhqrdr/nhqrdr09/13_timeliness/T13_2_2-1.html