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- W2970104927 abstract "In the diagnosis of pulmonary embolism (PE), the D-dimer threshold is based on studies conducted in Western countries, where the incidence rate is 5 times higher than that in Asian countries, including Japan. If we could elevate the D-dimer threshold based on the low pre-test probability in the Japanese population, we could omit the computed tomography pulmonary angiography (CTPA) which might lead to radiation exposure and contrast-induced nephropathy. Therefore, we aimed to determine a new D-dimer threshold specific to Japanese individuals.We conducted a retrospective cohort study at an emergency department in Japan, using medical charts collected from January 2013 to July 2017. We included patients whose D-dimer were measured for suspicion of PE with low or intermediate probability of PE and CTPA were performed. The primary outcome was failure rate of the new D-dimer threshold, defined as the rate of PE detected by CTPA among patients with D-dimer under the new threshold ranging from 1000 to 1500 μg/L by 100. The new D-dimer threshold was appropriate if the upper limit of 95% confidence interval of the failure rate of PE was approximately 3%.In 395 patients included, the number of patients with PE was 24 (the prevalence was 6.1%). If the D-dimer threshold was 1100 μg/L, the failure rate was 0% (0/119), the upper limit of the 95% confidence interval of the failure rate was 3.1%, and 30% (119/395) of the CTPA might be omitted.The new D-dimer threshold could safely exclude PE. This result can be generalized to other Asian populations with a lower incidence of PE. Further prospective studies will be needed." @default.
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- W2970104927 date "2019-08-28" @default.
- W2970104927 modified "2023-10-01" @default.
- W2970104927 title "New d-dimer threshold for Japanese patients with suspected pulmonary embolism: a retrospective cohort study" @default.
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- W2970104927 doi "https://doi.org/10.1186/s12245-019-0242-y" @default.
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