Association of unstable angina guideline care with improved survival.

Abstract
IN 1994, THE Agency for Health Care Policy and Research (AHCPR) released guidelines on the diagnosis and management of unstable angina,1 a diagnosis that leads to at least 1 million hospitalizations per year in the United States.2 The individual recommendations in the guideline were based on randomized, controlled trial evidence or other available evidence for net clinical benefit. Data on long-term outcomes in patients with unstable angina are available from a few published registries1,3,4 and patient follow-up in clinical trials.5-7 However, data are sparse regarding the association of concordance with guideline recommendations and outcomes in a general population of hospitalized patients.8 We recently reported on a new, simple method for evaluating the AHCPR guideline in patients hospitalized with unstable angina.9 We herein have extended this investigation to examine the relationship between treatment concordant with guideline care and 1-year outcomes.