Table 1. Confirmatory Positive compared to Confirmatory Negative Patients.

Comparison of demographics and laboratory values.

Outcome Variable	Confirm+ N= 98	Confirm- N=17	P-value
Age*	65 ± 15	63 ± 17	0.148
Female	55 (56%)	9 (53%)	1.000
African American	32 (32%)	9 (53%)	0.168
Caucasian	67 (68%)	8 (47%)	0.166
Platelet Count Nadir*	55,500 ± 44,000/μL	46,000 ± 31,000/μL	0.489
% Decrease Platelet Count from Baseline*	70% ± 23%	69% ± 20%	0.543
Anti-Heparin/PF4 Titer*	0.77 ± 0.84	0.82 ± 0.78	0.552
Cardiothoracic surgery service	35 (35%)	4 (24%)	0.413
Medicine service	30 (30%)	6 (34%)	0.779

^*median.