TABLE 1

Demographic Characteristics

CharacteristicNo. of Observations (n = 5516)Weighted % (95% CI)
Age category, y
 0–361510.7 (9.6–11.8)
 4–11215039.2 (37.2–41.3)
 12–18275150.1 (48.1–52.1)
Gender
 Female350362.7 (61.1–64.3)
 Male201337.3 (35.7–38.9)
Race/ethnicity
 White/non-Hispanic285254.5 (51.4–57.7)
 Black/non-Hispanic131923.3 (20.5–26.0)
 Hispanic114619.5 (16.3–22.7)
 Other1992.7 (2.1–3.2)
Insurance status
 Private228343.1 (41.1–45.1)
 Medicare490.9 (0.5–1.3)
 Medicaid210935.9 (34.1–37.7)
 Self-pay/none62512.3 (11.1–13.5)
 Other/unknown4507.8 (6.6–9.1)
ED characteristics
 Academic90113.2 (11.4–15.2)
 Pediatric73412.7 (10.4–15.1)
 Safety net273448.2 (46.2–50.2)
Region
 Northeast121515.6 (13.4–17.7)
 Midwest121423.4 (19.8–27.0)
 South200542.7 (28.5–46.9)
 West108218.3 (15.4–21.2)
Urban
 MSAa387285.0 (79.3–90.8)
  • a MSA not collected in each year of NHAMCS (total n for which MSA collected = 4437).