Table C. Standard errors for ambulatory medical expensesa for injury-related conditions: United States, 1997 Corresponds to Table 3 Injury-related ambulatory expenses Expense per person with expense Population characteristic Total in thousands Per capita Percent of total ambulatory expenses due to injuryb Median Mean Standard error Total 1,876,730 6.9 0.9 8 48 Age in years Under 16 230,738 3.5 1.4 11 29 16-24 392,746 11.5 2.6 26 69 25-44 1,597,652 19.2 2.4 14 119 45-64 943,243 16.6 1.5 24 98 65 and over 422,764 12.2 0.9 26 75 Sex Male 1,619,700 12.5 1.8 11 83 Female 745,358 5.2 0.7 13 37 Race/ethnicity Hispanic 194,750 6.0 1.6 21 54 Black 240,351 6.9 1.6 22 61 White 1,807,884 9.4 1.1 10 58 Other 230,470 20.1 3.9 55 201 Health insurance statusc Under age 65: Any private 1,722,207 10.0 1.3 10 64 Public only 334,918 11.3 1.8 21 84 Uninsured 352,055 10.8 3.4 31 104 Age 65 and over: Medicare only 241,217 27.5 2.3 35 178 Medicare and private 367,871 16.3 1.1 35 100 Medicare and other public 45,023 13.1 1.2 75 115 Poverty status Poor 303,521 7.6 1.2 20 51 Near-poor 363,914 28.8 4.0 28 203 Low income 753,914 20.1 2.8 25 160 Middle income 1,307,478 15.0 1.9 15 105 High income 827,082 8.3 1.1 16 52 aExpenses for visits to medical providers seen in office-based settings or clinics, hospital outpatient departments, emergency rooms (except visits resulting in an overnight hospital stay), and clinics owned and operated by hospitals, as well as expenses for events reported as hospital admissions without an overnight stay, are included. bNumerator is total expenses for injuries. Denominator is total medical expenses for both injury- and non-injury-related conditions. cUninsured refers to persons uninsured during the entire year. Public and private health insurance categories refer to individuals with public or private insurance at any time during the period. Individuals with both public and private insurance and those with CHAMPUS or CHAMPVA (Armed-Forces-related coverage) are classified as having private insurance. dPoor refers to family incomes at or below the Federal poverty line; near-poor, over the poverty line through 125 percent of the poverty line; low income, over 125 percent through 200 percent of the poverty line; middle income, over 200 percent to 400 percent of the poverty line; and high income, over 400 percent of the poverty line. Note: Restricted to civilian noninstitutionalized population. Source: Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality: Medical Expenditure Panel Survey, 1997. dPoor refers to family incomes at or below the Federal poverty line; near-poor, over the poverty line through 125 percent of the poverty line; low income, over 125 percent through 200 percent of the poverty line; middle income, over 200 percent to 400 percent of the poverty line; and high income, over 400 percent of the poverty line. Note: Restricted to civilian noninstitutionalized population. Source: Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality: Medical Expenditure Panel Survey, 1997. a Room and board and all hospital diagnostic and laboratory expenses associated with the basic facility charge, payments for separately billed physician inpatient services, and emergency room expenses incurred immediately prior to inpatient stays areincluded. Expenses for hospital discharges that did not involve an overnight stay, which are ambulatory expenses (Table 3), are excluded. Expenses for newborns who left the hospital on the same day as the mother are included in the mother’s record. b Numerator is inpatient expenses for injuries. Denominator is total inpatient expenses for both injury- and non-injury-related conditions. c For health insurance status, uninsured refers to persons uninsured during the entire year. Public and private health insurance categories refer to individuals with public or private insurance at any time during the period. Individuals with both public and private insurance and those with CHAMPUS or CHAMPVA (Armed-Forces-related coverage) are classified as having private insurance. d Poor refers to family incomes at or below the Federal poverty line; near-poor, over the poverty line through 125 percent of the poverty line; low income, over 125 percent through 200 percent of the poverty line; middle income, over 200 percent to 400 percent of the poverty line; and high income, over 400 percent of the poverty line. *Relative standard error equal to or greater than 30 percent. Note: Restricted to civilian noninstitutionalized population. Source: Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality: Medical Expenditure Panel Survey, 1997.