FBL and acute promyelocytic leukemia: The FDP/Fib and DD/Fib ratios can be used to predict high‐risk patients with fatal thrombosis complications of acute abnormal promyelocytic leukemia (APL) and to predict the presence of pelvic fractures caused by arterial extravasation.16, 17 Changes in the FDP/Fib and DD/Fib ratios are more significantly correlated with Fib, FDP, or DD levels and may be helpful in designing lower risk treatment regimens or personalized therapies.10, 18, 19 Therefore, in this study, we calculated the 95% CIs of different D‐dimer results and used large‐scale data to calculate the FDP/DD ratio.