Characteristics  Patient 1a  Patient 2  Patient 3  Patient 4  Patient 5
Age in years  63  53  63  70  46
Sex  Male  Male  Male  Female  Female
Indication for anticoagulation  DVT  Acute coronary syndrome and atrial fibrillation  DVT  DVT  Suspected PE
Confirmed thrombosis via imaging  Yes  No  Yes  Yes  No
Days from initiation of heparin to drop in platelets  11  7  6  8  2
4T score  6  5  7  7  4
PF4 antibody (optical density)  Positive (1.243)  Positive (0.707)  Positive (0.767)  Positive (0.042)  Positive (0.307)
Serotonin release assay  Positive  Negative  Negative  Negative  Negative
Presence of DIC by ISTH criteria  No  No  No  Yes  Yes