Time to reintervention analysis
Time to reintervention using Kaplan-Meier statistics for the entire cohort of 309 patients showed 16 events (re-interventions) with freedom from re-intervention along the span of the study of 17-year was 95 %. The mean follow-up time was 9.3 years (Figure 3). Survival analysis with stratification by the sex, surgeon, type of transposition and balloon atrial septostomy using log-rank statistics showed no significant differences.