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Kaplan-Meier survival curves for all patients up to 5 years after surgery, stratified by preoperative BNP >292 pg/mL versus ≤ 292 pg/mL (A) and by preoperative BNP >141 pg/mL versus ≤ 141 pg/mL (B).
95% confidence intervals are shown for the survival estimates for each year of postoperative follow-up.
