Information was available only for 23 patients. In Kaplan-Meier method, cumulative survival tables and the 2 cases, the clinical record was lost and there was noMantel-Cox test, were used to perform comparisons over possibility of tracking and knowing the clinical variables. time, until the occurrence of events in the groups of primary Between 2007 and 2009 only 5 devices were implanted, or secondary prevention.
Se empleó el método de Kaplan-Meier y tablas de sobrevida acumulada y la prueba de Mantel-Cox, para establecer comparaciones en el tiempo, hasta la ocurrencia de eventos en los grupos de prevención primaria o secundaria.