| Autors: Prodanova, K. S., Negreva M. Title: Coagulation Parameters as Predictors of Paroxysmal Atrial Fibrillation: Data Modeling by Logistic Regression and ROC Analysis Keywords: Abstract: Our research on patients with paroxysmal atrial fibrillation (PAF) found significant deviations in fourteen coagulation indicators already occurring in the first twenty-four hours of the clinical manifestation of the disease, namely: significantly increased plasma activity of coagulation factors FII, FV, FVII, FVIII, FIX, FX, FXI, FXII and plasma activity of von Willebrand factor, as well as significantly increased plasma levels of tissue factor, FVIII, vWF, fibrinopeptide A and prothrombin fragment F1+2. The early nature of the deviations raises an important question, namely, to what extent are they a consequence of atrial fibrillation or are they closely related to the clinical manifestation of the arrhythmia and precede it. In search of their predictive value for PAF occurrence, the performed logistic regression analysis and ROC analysis showed that, of the investigated indicators, plasma FVIII activity gives the best diagnostic opportunity to identify the occurrence of the disease (AUC=0.85, Acc=0.85, Se 99 %, Sp 69%, with over 70% correctly classified cases). Our results are important for clinical practice and are a good prerequisite for further prospective clinical studies. Establishment of significant biomarkers predicting PAF appearance will enable detection of patients at increased risk of thromboembolic events, prevention optimization and reduction of the frequency of thromboembolic events associated with the rhythm disorder. References
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