Fig. 4From: Standard coagulation assays alone are not sufficient to exclude surgically relevant rivaroxaban plasma concentrationsCorrelation of rivaroxaban plasma concentration and aPTT. A statistically significant correlation is observed (Pearson's correlation coefficient 0.53, p < 0.001; R2 linear 0.28). aPTT = activated partial thromboplastin time, RXA = rivaroxabanBack to article page