External validation of the PLASMIC score: a clinical prediction tool for thrombotic thrombocytopenic purpura diagnosis and treatment.
External validation of the PLASMIC score: a clinical prediction tool for thrombotic thrombocytopenic purpura diagnosis and treatment.
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DOI:
10.1111/jth.13882
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发表时间:
2018-01
期刊:
影响因子:
--
通讯作者:
Garcia DA
中科院分区:
文献类型:
--
作者:
Li A;Khalighi PR;Wu Q;Garcia DA
The PLASMIC score was recently published to distinguish patients with severe ADAMTS-13 deficiency from those without for early identification of thrombotic thrombocytopenia purpura (TTP). We performed an independent external validation of the PLASMIC score for clinical prediction of severe ADAMTS-13 deficiency. We studied an independent cohort of 112 consecutive hospitalized patients with suspected thrombotic microangiopathy and appropriate ADAMTS-13 testing (including 21 patients with TTP diagnosis). The PLASMIC score model predicted severe ADAMTS-13 deficiency with a c statistic of 0.94 (0.88–0.98). When dichotomized at high (score 6–7) versus low-intermediate risk (score 0–5), the model predicted severe ADAMTS-13 deficiency with positive predictive value of 72%, negative predictive value of 98%, sensitivity of 90%, and specificity of 92%. In the low-intermediate risk group (score 0–5), there was no significant improvement in overall survival associated with plasma exchange. The PLASMIC score model had excellent applicability, discrimination, and calibration for predicting severe ADAMTS-13 deficiency. The clinical algorithm allowed identification of a subgroup of patients who lacked significant response to empiric treatment.
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影响因子:
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Chantarangkul, V.;Van den Besselaar, A. M. H. P.;Tripodi, A.
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