LAUSR

We wish to congratulate Socias et al.1 for their work on the prognostic impact of ST segment elevation acute coronary syndrome (STE-ACS) in Mallorca, Spain. Subpopulations with STE-ACS from two observational registries were compared in different time frames. In the IBERICA-Mallorca registry, fibrinolysis was the main reperfusion therapy, while the Código infarto-Illes Balears (CI-IB) registry implemented one healthcare network for the management of STE-ACS based on primary angioplasty (PA). From both registries, only 49.7 and 58.8 per cent of the populations were included for the analysis. Features from both samples varied significantly in aspects such as history; clinical profile; and effective medical therapy in the management of STE-ACS (betablockers and ACE).2 The main conclusion from the study1 is that the implementation of one PA network reduced mortality rate. However, the statistical analysis conducted deserves certain considerations: