Table 3. Clinical Outcomes.

Results are presented according to clinical laboratory testing status (Confirm+ or Confirm-) and according to clinical diagnosis of HIT (HIT+, HIT?, and HIT-). Abbreviations: HIT, heparin-induced thrombocytopenia; HITT, heparin-induced thrombocytopenia with thrombosis; DTI, direct thrombin inhibitor.

Outcome	Confirm+ (n=98)			Confirm- (n=17)
	HIT+ (n=56)	HIT? (n=15)	HIT- (n=27)	HIT+/HIT? (n=3)	HIT- (n=14)
Thromboembolic event (HITT; n=32)	26 (46%)	6 (40%)	0	0	0
Treated with a DTI (n=50)	41/56 (73%)	4/15 (27%)	1/27 (4%)	3/3 (100%)	1/14 (7%)
Isolated HIT patients	18/30 (60%)	0	-	3/3 (100%)	0
HIT with thrombosis patients	23/26 (88%)	4/6 (67%)	-	0	0
Hemorrhagic complication *	11/41 (27%)	2/4 (50%)	0	1/3 (33%)	0
Thromboembolic event *	3/41 (7%)	0	1/27 (4%)	2/3 (66%)	1/14 (7%)
Death *	9/41 (22%)	2/4 (50%)	1/27 (4%)	1 (33%)	0
Not treated with a DTI (n=65)	15/56 (27%)	11/15 (73%)	26/27 (96%)	0	13/14 (93%)
Hemorrhagic complications	2/15 (13%)	1/11 (9%)	8/26 (31%)	-	3/14 (21%)
Thromboembolic complications	2/15 (13%)	2/11 (18%)	4/26 (15%)	-	7/14 (50%)
Death	3/15 (20%)	2/11 (18%)	4/26 (15%)	-	2/14 (14%)

^*Clinical events occurring after diagnosis of HIT initially made. These events may have occurred while the patient was on a DTI, or after the DTI had been discontinued.