Table 2.
Characteristics of 240 Patients Who Underwent Placement of Retrievable IVC Filters and Were Discharged Alive
| Plan to remove filter, N = 73 | No plan to remove filter, N = 167 | P value | |
|---|---|---|---|
| N(%) or mean±SD | N(%) or mean±SD | ||
| Age (mean years ±SD) | 55.4 ± 16.7 | 60.5 ± 15.2 | 0.02 |
| Age | 0.03 | ||
| <50 years | 28 (38.4) | 36 (21.6) | |
| 50–69 years | 31 (42.5) | 88 (52.7) | |
| ≥70 years | 14 (19.2) | 43 (25.8) | |
| Female | 39 (53.4) | 80 (47.9) | 0.43 |
| Race | 0.75 | ||
| White | 54 (74.0) | 118 (70.7) | |
| Black | 4 (5.5) | 10 (6.0) | |
| Latino | 1 (1.4) | 6 (3.6) | |
| Asian-American/Pacific Islander | 5 (6.9) | 17 (10.2) | |
| Other/unknown | 9 (12.3) | 16 (9.6) | |
| Language | 0.42 | ||
| English | 63 (86.3) | 141 (84.4) | |
| Spanish | 1 (1.4) | 6 (3.6) | |
| Chinese | 1 (1.4) | 4 (2.4) | |
| Other | 4 (5.5) | 3 (1.8) | |
| Unknown | 4 (5.5) | 13 (7.8) | |
| Admitting service | 0.64 | ||
| General medicine | 19 (26.0) | 46 (27.5) | |
| Surgicala | 40 (54.8) | 97 (58.1) | |
| Otherb | 14 (19.2) | 24 (14.4) | |
| Primary indication for filter placement | 0.004 | ||
| VTE, anticoagulation contraindicated | 46 (63.0) | 125 (74.9) | |
| VTE, on anticoagulation or unspecified | 5 (6.9) | 18 (10.8) | |
| High risk for VTE from surgery | 15 (20.6) | 9 (5.4) | |
| Other | 7 (9.6) | 15 (9.0) | |
| Comorbid medical conditions | |||
| History of malignancy | 23 (31.5) | 95 (56.9) | <0.001 |
| Prior VTE | 30 (41.1) | 31 (18.6) | <0.001 |
| Hypertension | 26 (35.6) | 42 (25.2) | 0.10 |
| Coronary artery disease | 6 (8.2) | 19 (11.4) | 0.46 |
| Congestive heart failure | 3 (4.1) | 12 (7.2) | 0.37 |
| Chronic lung disease | 5 (6.9) | 13 (7.8) | 0.51 |
| Length of stay (mean days ± SD) | 17.6 ± 21.5 | 19.6 ± 18.1 | 0.46 |
| Anticoagulation at dischargec | <0.001 | ||
| None | 20 (29.4) | 96 (61.9) | |
| Warfarin only | 17 (25.0) | 22 (14.2) | |
| Enoxaparin plus warfarin | 16 (23.5) | 12 (7.7) | |
| Enoxaparin only | 15 (22.1) | 25 (16.1) | |
| Disposition | 0.12 | ||
| Home | 53 (72.6) | 98 (58.7) | |
| Skilled nursing facility/rehabilitation center | 15 (20.6) | 53 (31.7) | |
| Other acute care facility | 5 (6.9) | 16 (9.6) |
IVC = inferior vena cava, SD = standard deviation, VTE = venous thromboembolism
aSurgical services were: general, cardiothoracic, head and neck, gynecologic, transplant, neurosurgery, orthopedics, vascular, and urology
bOther services were: cardiology, cancer service, gynecology, pediatrics, and neurology
cInformation on anticoagulation use at discharge was missing for 17 individuals