Table 4.

Comparison of platelet count, PT, aPTT, fibrinogen, D-dimer, and DIC scores between patients with and without anti-PF4/heparin antibodies.

P-values obtained from Mann-Whitney U test^a) and Chi-Square test^b).

^c)Anti-PF4/heparin antibody was defined as negative when all the results of the 2 assays were within the Cutoff values (optical density of 0.304 for Asserachrom HPIA and 1U/mL for HemosIL HIT-Ab based on the manufacturer's recommendations) and was defined as positive when at least one of the 2 results was beyond the cutoff values.

Abbreviations: PT, prothrombin time; aPTT, activated partial prothrombin time; DIC, disseminated intravascular coagulation; PF4, platelet factor 4.