Survival rate and readmission rate after the first episode of myocardial infarction.

Abstract

The aim is to estimate the overall one-year survival rate and readmission rate after the first myocardial infarction. A cohort study involving 689 patients followed up between August 2016 and March 2022. The Kaplan-Meier estimator and the log-rank test were used. Cox semiparametric model was used to estimate death and readmission risk. The mean age was 60.0 (SD 11.0) years old, 67.9% men and 50.7% with ST-elevation myocardial infarction. The overall survival rate was 96.3%, with median time of death of 41.5 days. The readmission-free survival rate was 83.4%, with median time of readmission of 54 days. Age of 60 years and over increased death risk by 10.01 and the presence of systemic arterial hypertension increased readmission risk by 1.52. The overall survival rate was 96.2% with difference in age groups. The readmission-free survival rate was 83.4%, with difference by the presence of systemic arterial hypertension. As these events are quite prevalent, a better assessment of the effectiveness of the health care provided and the actions that must be taken to reduce the incidence and consequent morbidity and mortality is necessary.