Table 1.

Demographic and Clinical Characteristics of Patients According to Location of Deep Vein Thrombosis^*

Variable	Upper Extremity Deep Vein Thrombosis (n=69)	Lower Extremity Deep Vein Thrombosis (n=414)	P-value
Demographic Factors
Age (mean, years)	59	66	<0.001
Age (years, %)
<55	42.0	25.6
55-64	8.7	11.1	0.04
65-74	18.8	22
≥75	30.4	41.3
Female (%)	47.8	54.6	0.29
Race (%)
Caucasian	86.7	91.7
Black	1.5	3.2	0.002
Asian	1.5	0.0
Hispanic	8.8	2.0
Unknown	1.4	3.1
Body Mass Index (%) **			0.02
<25	45	34.7
25-30	42.5	30.3
>30	12.5	35.0
Risk Factors (%)
>48 hr Bed Rest in last month	39.1	46.9	0.48
Recent Prior Hospitalization†	56.5	36.5	<0.001
Recent surgery†	48.5	27.9	<0.001
Recent Malignancy†	43.5	32.8	0.07
Recent Severe Infection†	49.3	32.4	0.01
Admission of non-venous thromboembolism related diagnosis (immediately prior venous thromboembolism)	43.5	23	<0.001
Recent central venous Catheter†	62.3	11.8	<0.001
Prior venous thromboembolism	8.7	19.8	0.03
Recent Intensive Care Unit Discharge†	24.6	15.2	0.05
Recent Intubation†	18.8	15.0	0.41
Recent Hormonal Therapy†	7.3	7.7	0.89
Recent Fracture†	15.9	10.1	0.15
Recent Chemotherapy†	20.3	6.3	<0.001
Recent Heart Failure†	8.7	5.3	0.26
Recent Cardiac Procedures†	11.6	3.3	0.001

^*Other risk factors with <5 % prevalence (in descending order of frequency) include: venous stasis/ulcer, family history of venous thromboembolism, varicose veins, superficial thrombophlebitis, prolonged air travel, recent lower extremity paresis, known hypercoagulable state, recent pregnancy or delivery, and recent spinal cord injury

^**146 patients missing data for body mass index

^†Recent = active or occurring within 3 months of diagnosis of VTE