Table 4. Multivariate Logistic Regression Analysis for Patients With HIT and Primary Hypercoagulable States.

Variable	Odds ratio	Lower 95% CI	Upper 95% CI	P value
Diabetes with chronic complications	1.561	0.753	3.235	0.231
Renal failure	2.955	1.994	4.380	< 0.0005*
Major surgery	1.735	1.275	2.361	< 0.0005*
Congestive heart failure	4.497	2.466	8.202	< 0.0005*
Autoimmune disease	1.712	1.120	2.618	0.013*

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