Table 3.

Multivariate conditional logistic regression model (VTE = 94, no VTE = 272)

Risk factors	OR	95% CI	p value
Cranial surgery	16.1	3.2–80.4	<0.001
Intensive care patient	3.0	1.5–5.9	0.002
Admission leukocyte count > 13,000/mm3	2.7	1.4–5.1	0.003
Indwelling central venous catheter	2.5	1.3–4.7	0.007
Long term/chronic care facility	2.1	1.0–4.2	0.04

Note: 8 controls were excluded from the pooled model due to missing leukocyte values