Table 2. Multivariate Logistic Regression Analysis for Patients With HIT.

Variable	Odds ratio	Lower 95% CI	Upper 95% CI	P value
Obesity	1.377	1.276	1.486	< 0.0005*
Tumor	1.680	1.436	1.966	< 0.0005*
Metastatic cancer	1.900	1.628	2.217	< 0.0005*
Uncomplicated diabetes	1.183	1.109	1.263	< 0.0005*
Diabetes with chronic complications	1.326	1.192	1.474	< 0.0005*
Drug abuse	1.150	1.000	1.323	0.05*
Renal failure	2.670	2.497	2.856	< 0.0005*
Primary hypercoagulable state	11.338	8.104	15.863	< 0.0005*
Major surgery	2.100	1.978	2.229	< 0.0005*
Congestive heart failure	1.985	1.836	2.145	< 0.0005*
Autoimmune disease	1.753	1.484	2.072	< 0.0005*

*P < 0.05 statistically significant. HIT: heparin-induced thrombocytopenia; CI: confidence interval.