Table 3.

Characteristics of 92 patients who underwent the anti-heparin/PF4 antibody ELISA

^*P value: chi-square test for categorical variables and Man-Whitney U test for continuous variables.

Data are shown as the median (range) for continuous variables or the number (percentage) for categorical variables unless otherwise indicated. Heparin/PF4 Ab was measured by a commercial ELISA kit, and positive results were defined as optical density (OD) value ≥ 0.4.

Abbreviations: PF4, platelet factor 4; Ab, antibody; UFH, unfractionated heparin; LMWH, low molecular weight heparin; OD, optical density; HIT, heparin-induced thrombocytopenia.