Table 6.

Binomial logistic regression of VTE rates

Variable	B	SE	Odds ratio (95% CI)	p-value
Age	0.003	0.020	1.003 (0.964–1.044)	0.881
AIS score	0.622	0.823	1.863 (0.371–9.357)	0.450
Orthopaedic injury	-1.028	0.791	0.358 (0.076–1.686)	0.194
Heparin < 24 hr	-1.649	0.748	0.192 (0.044–0.832)	0.027
Constant	-0.297	1.444	0.743 (N/A)	0.837

VTE, venous thromboembolism; B, log odds change coefficient; SE, standard error; CI, confidence interval; AIS, American Spinal Injury Association Impairment Scale; N/A, not applicable.

AIS Score: 0=C or D, 1=A or B. Orthopaedic Injury: 0=yes, 1=no. Heparin < 24 hr: 0=no, 1=yes.