Table 1.
Patient Characteristics of Index Admissions Associated With Acute VTE, Stratified by 30‐Day Readmission Status
| Variable | All Index Admissions (N=1 103 742) | Nonelective 30‐d Readmission | ||
|---|---|---|---|---|
| Yes (n=193 632) | No (n=910 110) | P Value | ||
| VTE | <0.001 | |||
| Pulmonary embolism | 325 850 (29.5) | 51 417 (26.6) | 274 433 (30.2) | <0.001 |
| Deep vein thrombosis | 602 126 (54.6) | 117 107 (60.5) | 485 019 (53.3) | <0.001 |
| Both | 175 766 (15.9) | 25 108 (13.0) | 150 658 (16.6) | <0.001 |
| Saddle pulmonary embolus | 10 901 (1.0) | 1095 (0.6) | 9806 (1.1) | <0.001 |
| Acute cor pulmonale | 1816 (0.2) | 238 (0.1) | 1578 (0.2) | <0.001 |
| Thrombophlebitis | 57 040 (5.2) | 9726 (5.0) | 47 314 (5.2) | 0.001 |
| Provoking factors associated with VTE present during admission | ||||
| Malignancy | 217 402 (19.7) | 51 565 (26.6) | 165 837 (18.2) | <0.001 |
| Recent surgery | 213 163 (19.3) | 42 454 (21.9) | 170 709 (18.8) | <0.001 |
| Recent trauma | 50 474 (4.6) | 8293 (4.3) | 42 181 (4.6) | <0.001 |
| Hypercoagulability | 36 821 (3.3) | 6046 (3.1) | 30 775 (3.4) | <0.001 |
| Pregnancy | 11 043 (1.0) | 1179 (0.6) | 9864 (1.1) | <0.001 |
| Age, mean±SD, y | 64.0±17.3 | 64.8±16.9 | 63.9±17.3 | <0.001 |
| Female sex | 580 632 (52.6) | 102 849 (53.1) | 477 783 (52.5) | <0.001 |
| Primary insurance | <0.001 | |||
| Medicare | 627 703 (57.0) | 119 763 (62.0) | 507 940 (55.9) | <0.001 |
| Medicaid | 122 082 (11.1) | 27 344 (14.1) | 94 738 (10.4) | <0.001 |
| Private | 267 365 (24.3) | 34 767 (18.0) | 232 598 (25.6) | <0.001 |
| Self‐pay | 40 725 (3.7) | 5464 (2.8) | 35 261 (3.9) | <0.001 |
| Other | 43 459 (3.9) | 5966 (3.1) | 37 493 (4.1) | <0.001 |
| Median household income by residential zip code | <0.001 | |||
| Lowest quartile | 313 413 (28.8) | 58 261 (30.5) | 255 152 (28.5) | <0.001 |
| Middle lowest quartile | 265 269 (24.4) | 46 036 (24.1) | 219 233 (24.5) | 0.001 |
| Middle highest quartile | 260 176 (23.9) | 44 513 (23.3) | 215 663 (24.1) | <0.001 |
| Highest quartile | 247 686 (22.8) | 41 980 (22.0) | 205 706 (23.0) | <0.001 |
| Residence by county location | <0.001 | |||
| Central counties in metropolitan areas with population ≥1 million | 364 183 (33.0) | 71 770 (37.1) | 292 413 (32.2) | <0.001 |
| Fringe counties in metropolitan areas with population ≥1 million | 274 168 (24.9) | 49 022 (25.4) | 225 146 (24.8) | <0.001 |
| Counties in metropolitan areas with population 250 000–999 999 | 222 597 (20.2) | 36 264 (18.8) | 186 333 (20.5) | <0.001 |
| Counties in metropolitan areas with population 50 000–249 999 | 94 783 (8.6) | 15 055 (7.8) | 79 728 (8.8) | <0.001 |
| Micropolitan counties | 86 689 (7.9) | 12 817 (6.6) | 73 872 (8.1) | <0.001 |
| Other | 59 858 (5.4) | 8338 (4.3) | 51 520 (5.7) | <0.001 |
| No. of chronic conditions, mean±SD | 5.6±3.2 | 6.6±3.2 | 5.5±3.1 | <0.001 |
| Varicose veins | 5950 (0.5) | 662 (0.3) | 5288 (0.6) | <0.001 |
| Obesity | 174 637 (15.8) | 28 723 (14.8) | 145 914 (16.0) | <0.001 |
| Current or prior tobacco use | 275 169 (24.9) | 48 893 (25.3) | 226 276 (24.9) | <0.001 |
| Hypertension | 640 841 (58.1) | 116 883 (60.4) | 523 958 (57.6) | <0.001 |
| Congestive heart failure | 138 558 (12.6) | 33 563 (17.3) | 104 995 (11.5) | <0.001 |
| Diabetes mellitus | 277 924 (25.2) | 58 271 (30.1) | 219 653 (24.1) | <0.001 |
| Chronic pulmonary disease | 238 531 (21.6) | 50 018 (25.8) | 188 513 (20.7) | <0.001 |
| Pulmonary circulation disorders | 216 282 (19.6) | 39 899 (20.6) | 176 383 (19.4) | <0.001 |
| Renal disease | 177 924 (16.1) | 43 225 (22.3) | 134 699 (14.8) | <0.001 |
| Liver disease | 32 656 (3.0) | 7810 (4.0) | 24 846 (2.7) | <0.001 |
| Coagulopathy | 99 598 (9.0) | 21 530 (11.1) | 78 068 (8.6) | <0.001 |
| Anemia | 303 960 (27.5) | 67 349 (34.8) | 236 611 (26.0) | <0.001 |
| Fluid and electrolyte disorders | 335 626 (30.4) | 74 315 (38.4) | 261 311 (28.7) | <0.001 |
| Neurologic disorders/paralysis | 143 567 (13.0) | 28 597 (14.8) | 114 970 (12.6) | <0.001 |
| Alcohol abuse | 40 838 (3.7) | 7992 (4.1) | 32 846 (3.6) | <0.001 |
| Illicit drug abuse | 35 702 (3.2) | 8337 (4.3) | 27 365 (3.0) | <0.001 |
Data are given as number (percentage) unless otherwise indicated. For most variables, 0% to 2.5% had missing values. VTE indicates venous thromboembolism.