Table 1. Univariate Analyses for Patients Without HIT Compared to Patients With HIT.

Variable	Patients without HIT (N = 12,406)	Patients with HIT (N = 12,406)	P value
Age	64.8 ± 15.5	64.8 ± 15.5	1.000
Gender - female	6,091 (49.1%)	6,091 (49.1%)	1.000
Obesity	1,590 (12.8%)	2,188 (17.6%)	< 0.0005*
Solid tumor without metastases	313 (2.5%)	438 (3.5%)	< 0.0005*
Metastatic cancer	309 (2.5%)	515 (4.2%)	< 0.0005*
Lymphoma	141 (1.1%)	130 (1.0%)	0.502
Uncomplicated diabetes	2,774 (22.4%)	3,205 (25.8%)	< 0.0005*
Diabetes with chronic complications	733 (5.9%)	1,280 (10.3%)	< 0.0005*
Drug abuse	523 (4.2%)	439 (3.5%)	0.006*
Renal failure	1,875 (15.1%)	4,152 (33.5%)	< 0.0005*
AIDS	35 (0.3%)	35 (0.3%)	1.000
Primary hypercoagulable states	39 (0.3%)	416 (3.4%)	< 0.0005*
Major surgery	2,992 (24.1%)	4,533 (36.5%)	< 0.0005*
Congestive heart failure	1,304 (10.5%)	2,560 (20.6%)	< 0.0005*
Autoimmune disease	256 (2.1%)	489 (3.9%)	< 0.0005*

*P < 0.05 statistically significant. HIT: heparin-induced thrombocytopenia; AIDS: acquired immunodeficiency syndrome.