Table 2.

Demographic data stratified by Caprini score risk factors (N=3,334)

RISK FACTOR	% OF ALL PATIENTS WITH RISK FACTOR (n)
ONE POINT RISK FACTORS
Age 41-59	54.2% (1,808)
Minor surgery planned	5.1% (169)
Major surgery within 30 days	13.6% (452)
Varicose veins	1.0% (32)
History of IBD	0.7% (23)
Swollen legs (current)	3.2% (108)
Acute myocardial infarction <3 months	0.2% (5)
Congestive heart failure <1 month	0.7% (24)
Sepsis <1 month	0.5% (15)
Serious lung disease (inc. pneumonia) <1 month	0.5% (15)
Chronic obstructive pulmonary disease	2.2% (72)
TWO POINT RISK FACTORS
Age 60-74 years	16.2% (542)
Arthroscopic surgery	0.2% (5)
Malignancy (present or previous)	37.1% (1,237)
Laparoscopic surgery >45 minutes	0.2% (6)
Central venous access	9.0% (299)
THREE POINT RISK FACTORS
Age ≥75	4.6% (152)
History of DVT/PE	3.4% (114)
Family history of DVT/PE	1.1% (35)
Positive Factor V Leiden	0.3% (8)
Positive Prothrombin 20210A	0.03% (1)
Positive Lupus anticoagulant	0.1% (3)
Heparin induced thrombocytopenia	0.1% (3)
Elevated serum homocysteine	0
Elevated anticardiolipin antibodies	0
Other congenital or inherited thrombophilia	0.2% (7)
Polycythemia vera	0.1% (3)
FIVE POINT RISK FACTORS
Elective major lower extremity arthroplasty	0.5% (18)
Hip, pelvis, or leg fracture <1 month	0.4% (13)
Stroke <1 month	0.03% (1)
Multiple trauma <1 month	2.3% (76)
Acute spinal cord injury or paralysis <1 month	1.0% (3)
FEMALE-SPECIFIC RISK FACTOR (N=2,188)
ONE POINT RISK FACTORS
Oral contraceptives	7.1% (156)
Pregnancy or postpartum (<1 month)	0.2% (4)
History of unexplained stillborn infant recurrent spontaneous abortion (≥3), premature birth with toxemia or growth-restricted infant	0.3% (6)