Table 1:
Summary statistics of demographic variables and clinical characteristics for patients entering the CRIC, stratified by annual household income.
| Below $25,000 (n = 1652) | $25,000-$50,000 (n=1360) | $50,000-$100,000 (n=1033) | Above $100,000 (n=621) | p-value | ||
|---|---|---|---|---|---|---|
| Age (years) | 59.2 (10.3) | 60.5 (11.1) | 58.7 (10.9) | 59.6 (10.2) | <0.001 | |
|
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| Education Level | Some High School | 655 (39.6%) | 177 (13.0%) | 33 (3.2%) | 3 (0.5%) | <0.001 |
| High School Graduate | 384 (23.2%) | 328 (24.1%) | 106 (10.3%) | 27 (4.3%) | ||
| Some College | 437 (26.5%) | 499 (36.7%) | 345 (33.4%) | 109 (17.6%) | ||
| College Graduate | 176 (10.7%) | 356 (26.2%) | 549 (53.1%) | 482 (77.6%) | ||
|
| ||||||
| Enrollment ABI (lowest in either extremity) | Below 0.7 | 141 (8.5%) | 88 (6.5%) | 31 (3.0%) | 9 (1.4%) | <0.001 |
| 0.7 to 0.9 | 198 (12.0%) | 122 (9.0%) | 73 (7.1%) | 29 (4.7%) | ||
| 0.9 to 1.4 | 1202 (72.8%) | 1075 (79.0%) | 899 (87.0%) | 563 (90.7%) | ||
| Above 1.4 | 111 (6.7%) | 75 (5.5%) | 30 (2.9%) | 20 (3.2%) | ||
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| Male Gender | 787 (47.6%) | 776 (57.1%) | 658 (63.7%) | 447 (72.0%) | <0.001 | |
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| Black Race | 932 (56.4%) | 647 (47.6%) | 341 (33.0%) | 99 (15.9%) | <0.001 | |
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| eGFR (mL/min per 1.73 m2) | Below 30 | 383 (23.2%) | 194 (14.3%) | 109 (10.6%) | 33 (5.3%) | <0.001 |
| 30-60 | 1048 (63.4%) | 898 (66.0%) | 628 (60.8%) | 338 (54.4%) | ||
| Above 60 | 221 (13.4%) | 268 (19.7%) | 296 (28.7%) | 250 (40.3%) | ||
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| History of CVD | 681 (41.2%) | 459 (33.8%) | 285 (27.6%) | 142 (22.9%) | <0.001 | |
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| History of DM | 1011 (61.2%) | 692 (50.9%) | 446 (43.2%) | 243 (39.1%) | <0.001 | |
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| History of Hypertension | 1513 (91.6%) | 1206 (88.7%) | 852 (82.5%) | 464 (74.7%) | <0.001 | |
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| History of High Cholesterol | 1337 (80.9%) | 1106 (81.3%) | 801 (77.5%) | 469 (75.5%) | 0.004 | |
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| Tobacco Use | 320 (19.4%) | 149 (11.0%) | 77 (7.5%) | 39 (6.3%) | <0.001 | |
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| Medication Use | Statin | 940 (57.3%) | 819 (60.4%) | 580 (56.6%) | 358 (58.0%) | 0.22 |
| Antiplatelet | 826 (50.0%) | 685 (50.4%) | 454 (43.9%) | 294 (47.3%) | 0.007 | |
| Anticoagulant | 124 (7.5%) | 95 (7.0%) | 75 (7.3%) | 35 (5.6%) | 0.48 | |
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| PAD at Study Enrollment | 422 (25.5%) | 252 (18.5%) | 133 (12.9%) | 53 (8.5%) | <0.001 | |
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| Cause of Renal Disease | Diabetes | 551 (33.4%) | 344 (25.3%) | 219 (21.2%) | 100 (16.1%) | <0.001 |
| Hypertension | 242 (14.6%) | 209 (15.4%) | 148 (14.3%) | 78 (12.6%) | ||
| Other | 142 (8.6%) | 177 (13.0%) | 166 (16.1%) | 142 (22.9%) | ||
| Unknown | 717 (43.4%) | 630 (46.3%) | 500 (48.4%) | 301 (48.5%) | ||
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| CRIC Site | University of Pennsylvania | 154 (9.3%) | 186 (13.7%) | 138 (13.4%) | 103 (16.6%) | <0.001 |
| The Johns Hopkins University | 190 (11.5%) | 216 (15.9%) | 143 (13.8%) | 74 (11.9%) | ||
| Case Western Reserve University | 222 (13.4%) | 183 (13.5%) | 172 (16.7%) | 76 (12.2%) | ||
| University of Michigan | 150 (9.1%) | 185 (13.6%) | 182 (17.6%) | 110 (17.7%) | ||
| University of Illinois at Chicago | 617 (37.3%) | 210 (15.4%) | 72 (7.0%) | 26 (4.2%) | ||
| Tulane University Health Science Center | 243 (14.7%) | 179 (13.2%) | 99 (9.6%) | 44 (7.1%) | ||
| Kaiser Permanente of Norther California | 76 (4.6%) | 201 (14.8%) | 227 (22.0%) | 188 (30.3%) | ||