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Figure 7 Competing risks diagrams depicting the estimated prevalence of three mutually exclusive end states in 187 patients after initial operation: achievement of complete repair, death without repair, and remaining alive without repair. (A) Decreased rates of transition to complete repair and a higher prevalence of death are seen in a patient with only three bronchopulmonary segments supplied by the true pulmonary arteries and a large number of major aortopulmonary collateral arteries (MAPCAs). (B) Patients with all 18 bronchopulmonary segments supplied by the true pulmonary arteries via the ductus arteriosus, and therefore no MAPCAs, have increased transition rates to complete repair and lower pre-repair attrition.