Auditing patient registration in the Swedish quality register for acute coronary syndrome.
AIMS: The present study aims to quantify non-participation in the RIKS-HIA register during 2005 and to compare acute myocardial infarction (AMI) patients registered and not registered in RIKS-HIA, in relation to sociodemographic factors, prevalent disease, and 7-day and 30-day survival. METHODS: We linked information on sociodemographic characteristics, treatments, morbidity, and mortality from th