Table 1. This table describes the demographics, clinical characteristics, duplex scan results, and chemoprophylaxis for individuals admitted to inpatient rehabilitation with acute traumatic SCI.
| Category | n | Negative duplex | Positive duplex | Isolated distal DVT only as a % of all DVTs | Proximal DVT as a % of all DVTs | Any (proximal and/or distal) DVT χ2, P value | Proximal DVT χ2,P value |
|---|---|---|---|---|---|---|---|
| Total | 189 | 158 (83.6%) | 31 (16.4%) | 22 | 9 | ||
| AIS classification | |||||||
| AIS A | 40 (21.2%) | 31 (77.5%) | 9 (22.5%) | 6 (66.7%) | 3 (33.3%) | ||
| AIS B | 23 (12.2%) | 19 (82.6%) | 4 (17.4%) | 4 (100%) | 0 (0%) | ||
| AIS C | 42 (22.2%) | 31 (73.8%) | 11 (26.2%) | 7 (63.6%) | 4 (36.4%) | ||
| AIS D | 84 (44.4%) | 77 (91.7%) | 7 (8.3%) | 5 (71.4%) | 2 (28.6%) | ||
| Sex | χ2 = 0.8338, df = 1, P = 0.361 | χ2 = 0.2700, df = 1, P = 0.603 | |||||
| Male | 140 (74.1%) | 115 (82.1%) | 25 (17.9%) | 19 (76.0%) | 6 (24.0%) | ||
| Female | 49 (25.9%) | 43 (87.8%) | 6 (12.2%) | 3 (50.0%) | 3 (50.0%) | ||
| Age | χ2 = 14.9410, df = 1, P = 0.000* | χ2 = 1.8900, df = 1, P = 0.169 | |||||
| <50 years of age | 84 (44.4%) | 80 (95.2%) | 4 (4.8%) | 2 (50.0%) | 2 (50.0%) | ||
| ≥50 years of age | 105 (55.5%) | 78 (74.3%) | 27 (25.7%) | 20 (74.1%) | 7 (25.9%) | ||
| Level of injury | χ2 = 0.9353, df = 1, P = 0.333 | χ2 = 0.4233, df = 1, P = 0.4233 | |||||
| C1–C8 | 124 (65.6%) | 106 (85.5%) | 18 (14.5%) | 13 (72.2%) | 5 (27.8%) | ||
| T1 and below | 65 (34.4%) | 52 (80%) | 13 (20.0%) | 9 (69.2%) | 4 (30.8%) | ||
| Co-morbidities | |||||||
| Presence of IVC filter | 29 (15.3%) | 22 (75.9%) | 7 (24.1%) | 5 (71.4%) | 2 (28.6%) | χ2 = 1.4951, df = 1, P = 0.221 | χ2 = 0.3442, df = 1, P = 0.557 |
| History of malignancy | 23 (12.2%) | 17 (73.9%) | 6 (26.1%) | 6 (100.0%) | 0 (0%) | χ2=1.7913, df = 1, P = 0.181 | χ2=1.3093, df = 1, P = 0.253 |
| History of DVT or PE in the acute care | 8 (4.2%) | 3 (37.5%) | 5 (62.5%) | 4 (80.0%) | 1 (20.0%) | ||
| History of lower extremity fracture since injury | 10 (5.3%) | 9 (90.0%) | 1 (10.0%) | 0 (0.0%) | 1 (100.0%) | χ2 = 0.3156, df = 1, P = 0.574 | χ2 = 0.6388, df = 1, P = 0.424 |
| Chemoprophylaxis | |||||||
| No chemoprophylaxis | 49 (25.9%) | 41 (83.7%) | 8 (16.3%) | 7 (87.5%) | 1 (12.5%) | ||
| LMWH | 67 (35.4%) | 59 (88.1%) | 8 (11.9%) | 7 (87.5%) | 1 (12.5%) | ||
| UH | 67 (35.4%) | 56 (83.6%) | 11 (16.4%) | 6 (54.5%) | 5 (45.5%) | ||
| Other anticoagulant** | 6 (3.2%) | 2 (33.3%) | 4 (66.7%) | 2 (50.0%) | 2 (50.0%) |
* statistically significant P < 0.05.
**other anticoagulant: warfarin, fondaparinux, apixaban, dabigatran, rivaroxaban, or prasugrel.
AIS, ASIA Impairment Scale; DVT, deep vein thrombosis; PE, pulmonary embolism; χ2, chi-square; LMWH, low molecular weight heparin; UH, unfractionated heparin; IVC, inferior vena cava; df, degree of freedom.