Racial and ethnic differences in time to acute reperfusion therapy for patients hospitalized with myocardial infarction

JAMA. 2004 Oct 6;292(13):1563-72. doi: 10.1001/jama.292.13.1563.

Abstract

Context: Nonwhite patients experience significantly longer times to fibrinolytic therapy (door-to-drug times) and percutaneous coronary intervention (door-to-balloon times) than white patients, raising concerns of health care disparities, but the reasons for these patterns are poorly understood.

Objectives: To estimate race/ethnicity differences in door-to-drug and door-to-balloon times for patients receiving primary reperfusion for ST-segment elevation myocardial infarction; to examine how sociodemographic factors, insurance status, clinical characteristics, and hospital features mediate racial/ethnic differences.

Design, setting, and patients: Retrospective, observational study using admission and treatment data from the National Registry of Myocardial Infarction (NRMI) for a US cohort of patients with ST-segment elevation myocardial infarction or left bundle-branch block and receiving reperfusion therapy. Patients (73,032 receiving fibrinolytic therapy; 37,143 receiving primary percutaneous coronary intervention) were admitted from January 1, 1999, through December 31, 2002, to hospitals participating in NRMI 3 and 4.

Main outcome measure: Minutes between hospital arrival and acute reperfusion therapy.

Results: Door-to-drug times were significantly longer for patients identified as African American/black (41.1 minutes), Hispanic (36.1 minutes), and Asian/Pacific Islander (37.4 minutes), compared with patients identified as white (33.8 minutes) (P<.01 for all). Door-to-balloon times for patients identified as African American/black (122.3 minutes) or Hispanic (114.8 minutes) were significantly longer than for patients identified as white (103.4 minutes) (P<.001 for both). Racial/ethnic differences were still significant but were substantially reduced after accounting for differences in mean times to treatment for the hospitals in which patients were treated; significant racial/ethnic differences persisted after further adjustment for sociodemographic characteristics, insurance status, and clinical and hospital characteristics (P<.01 for all).

Conclusion: A substantial portion of the racial/ethnic disparity in time to treatment was accounted for by the specific hospital to which patients were admitted, in contrast to differential treatment by race/ethnicity inside the hospital.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • African Continental Ancestry Group / statistics & numerical data
  • Aged
  • Aged, 80 and over
  • Angioplasty, Balloon, Coronary / statistics & numerical data*
  • Asian Continental Ancestry Group / statistics & numerical data
  • European Continental Ancestry Group / statistics & numerical data
  • Female
  • Hispanic Americans / statistics & numerical data
  • Hospitals / statistics & numerical data
  • Humans
  • Insurance, Hospitalization / statistics & numerical data
  • Male
  • Middle Aged
  • Myocardial Infarction / ethnology*
  • Myocardial Infarction / therapy*
  • Outcome Assessment, Health Care*
  • Patient Admission / statistics & numerical data*
  • Retrospective Studies
  • Socioeconomic Factors
  • Thrombolytic Therapy / statistics & numerical data*
  • Time Factors
  • Time and Motion Studies*
  • United States