Patient-specific errors in agreement between International Normalized Ratios measured by a whole blood coagulometer and by a routine plasma-based method.
We applied a new statistical method to improve comparisons between systems measuring prothrombin time (PT) by splitting disagreement into systematic errors, which can be eliminated, and random errors, which can not. We found that the disagreement between International Normalized Ratio (INR) measurements based on plasma and whole blood was significantly patient-dependent.
Attermann
Jørn
J
Andersen
Niels T
NT
Korsgaard
Helle
H
Maegaard
Marianne
M
Hasenkam
J Michael
JM
D001780:Blood Coagulation Tests / Q000379:methods* / Q000592:standards; D003951:Diagnostic Errors; D006801:Humans; D019934:International Normalized Ratio / Q000592:standards*; D011517:Prothrombin Time