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Hazard ratio (compared with lowest trajectory)—Middle: 0.28 (95% CI, 0.10–0.85); P=0.03. Higher: 0.17 (95% CI, 0.03–0.91); P=0.04 [adjusted for type of Fontan, atrioventricular valve repair/replacement, number of prior procedures]. Age at last follow‐up censored at 16 years of age. BMI indicates body mass index.
