Trends in 30-day case fatality rate in patients hospitalized due to acute myocardial infarction in Beijing, 2007-2012 / 中华流行病学杂志

ABSTRACT

Objective To understand the distribution and trends in 30-day coronary heart disease (CHD) case fatality rate in patients hospitalized due to acute myocardial infarction (AMI) in Beijing during 2007-2012.Methods The clinical data of patients hospitalized due to AMI in Beijing from 1 January 2007 to 31 December 2012 were collected from "The Cardiovascular Disease Surveillance System in Beijing".A total of 77 943 local patients aged ≥25 years were hospitalized due to AMI in Beijing during the this period.After excluding duplicate records and validation for the completeness and accuracy of the records,the clinical characteristics of the patients and 30-day CHD case fatality rate in the patients were analyzed.Trends in 30-day CHD case fatality rate in the patients were analyzed with Poisson regression models.Results The age-standardized average 30-day CHD case fatality rate was 9.7％ in the 77 943 patients.During this period,a decreasing trend was observed in 30-day CHD case fatality rate after adjusting for age and gender (P＜0.001).The age-standardized 30-day CHD case fatality rate decreased by 16.0％,from 10.8％ in 2007 to 9.0％ in 2012.The decreases of 30-day CHD case fatality rates were noted in both men and women,whereas 30-day CHD case fatality rate was higher in women (14.1％) than in men (7.6％) after adjusting for age.During this period,the proportion of ST-segment elevation myocardial infarction (STEMI) decreased,while the proportion of non-ST-segment elevation myocardial infarction (NSTEMI) increased with year.A significant decline (20.1％) in 30-day case fatality rate of STEMI was found,but no decline was found for 30-day mortality rate of NSTEMI.Conclusion A decreasing trend in 30-day CHD case fatality rate was observed in the patients aged ≥25 years and hospitalized due to AMI in Beijing during 2007-2012,indicating the improvement in short-term prognosis of patients hospitalized due to AMI.Our findings highlight the urgent need to improve the treatment for woman and NSTEMI patients.