2010 National Healthcare Quality and Disparities Reports
|Population group||Sample size||Number of visits (in thousands)||Rate||SE||Sample size||Number of visits (in thousands)||Rate||SE|
|65 and over||739||7,731||105.2||9.9||696||6,747||93.9||9.8|
|Location of patient residence||MSA||2,416||22,024||44.1||3.0||2,371||17,808||36.1||2.8|
a Rates were computed using 2000-based postcensal estimates of the civilian noninstitutionalized population as of July 1 of each data year. Adverse effects of medical care were identified as office-based physician and hospital outpatient department visits for which a checkbox indicated that an adverse medical/surgical or medicinal drug event had occurred. For emergency visits, adverse effects were identified by International Classification of Diseases, Ninth Revision, codes of 995.0, 995.2, 995.4, or 996-999, or by a verbatim reason for visit or cause of injury indicating adverse medical, surgical, or drug effects.
b A proportion of race data were missing in each year. Race data were missing from 30.2% of the 2007-2008 adverse effect visit data. Missing data were imputed, and standard errors were inflated consistent with the guidance in "2007 NAMCS Microdata File Documentation," ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NAMCS/doc07.pdf.� These data should be interpreted with caution.
DSU - Data do not meet the criteria for statistical reliability, data quality, or confidentiality.
Key: AI/AN: American Indian or Alaska Native; NHOPI: Native Hawaiian or Other Pacific Islander; MSA: metropolitan statistical area; SE: standard error.
Source: Centers for Disease Control and Prevention, National Center for Health Statistics, National Ambulatory Medical Care Survey and National Hospital Ambulatory Medical Care Survey.