A total of 2321 paired aPTT/anti-Xa values from 539 patients were studied. Data pairs were discordant most of the time: 413 (18%) data pairs had a low aPTT value compared with the anti-Xa value ...
In addition, each aPTT/anti-Xa data pair that had a PT/INR determined the same date was identified and categorized as associated with either a low (<1.5) or high (≥1.5) INR. Once patients had ...