Fig. 2From: Standard coagulation assays alone are not sufficient to exclude surgically relevant rivaroxaban plasma concentrationsCorrelation of rivaroxaban plasma concentration and Quick. A statistically significant correlation is observed (Pearson's correlation coefficient − 0.59, p < 0.001; R2 linear 0.35). Quick = prothrombin time expressed as % of normal plasma pool, RXA = rivaroxabanBack to article page