Survival distribution function according to achievement of target international normalized ratio (INR). Full line: patients reaching target INR. Dotted line: patients not reaching target INR. X-axis: Days after prothrombin complex concentrate infusion. Y-axis: Survival distribution function. Estimated survival rates were 83.0% in patients reaching target INR and 65.5% in patients not reaching target INR (log-rank P < 0.0001).