Table 1.
Characteristics of CRIC participants at different time points throughout the course of kidney disease.
| Characteristic | At time of baseline CRIC enrollment | At time of dialysis initiation2 | ||||
|---|---|---|---|---|---|---|
| White (n=1638) |
Black (n=1650) |
P- value |
White (n=203) |
Black (n=475) |
P-value | |
| age | 58 ± 11 | 58 ± 11 | 0.004 | 62 ± 12 | 60 ± 12 | 0.009 |
| Men | 982 (60.0) | 806 (48.9) | <0.001 | 141 (69.5) | 253 (53.3) | <0.001 |
| Baseline income category | <0.001 | <0.001 | ||||
| ≤$20,000 | 254 (15.5) | 646 (39.2) | 58 (28.6) | 209 (44) | ||
| 20,001-50,000 | 416 (25.4) | 417 (25.3) | 58 (28.6) | 108 (22.7) | ||
| 50,001-100,000 | 455 (27.8) | 215 (13.0) | 42 (20.7) | 54 (11.4) | ||
| ≥100,000 | 295 (18.0) | 62 (3.8) | 18 (8.9) | 16 (3.4) | ||
| Don’t wish to answer | 218 (13.3) | 310 (18.8) | 27 (13.3) | 88 (18.5) | ||
| Education Completed | <0.001 | <0.001 | ||||
| < high school | 90 (5.5) | 437 (26.5) | 13 (6.4) | 146 (30.7) | ||
| High school | 291 (17.8) | 366 (22.2) | 52 (25.6) | 97 (20.4) | ||
| Some college | 467 (28.5) | 567 (34.4) | 69 (34.0) | 162 (34.1) | ||
| ≥College graduate | 790 (48.2) | 280 (17.0) | 69 (34.0) | 70 (14.7) | ||
| Insurance | <0.001 | <0.001 | ||||
| None | 48 (3.2) | 96 (5.8) | 4 (2.0) | 31 (6.5) | ||
| Medicaid | 96 (5.9) | 327 (19.8) | 16 (7.9) | 80 (16.8) | ||
| Medicare | 564 (34,4) | 494 (29.9) | 67 (33.0) | 153 (32.2) | ||
| VA/military | 73 (4.5) | 110 (6.7) | 5 (2.5) | 20 (4.2) | ||
| Private | 284 (17.3) | 190 (11.5) | 101 (49.8) | 157 (33.1) | ||
| Unknown | 573 (35.0) | 433 (26.2) | 10 (4.9) | 34 (7.2) | ||
| serum albumin (g/dL) | 4.0 [3.8-4.3] | 4.0 [3.7-4.2] | <0.001 | 3.6 [3.2-3.9] | 3.5 [3.1-3.8] | 0.04 |
| proteinuria (g/d) | 0.10 [0.05-0.38] | 0.19 [0.06-0.87] | <0.001 | --- | --- | --- |
| Tobacco use | 155 (9.5) | 320 (19.4) | <0.001 | 14 (6.9) | 42 (8.8) | 0.4 |
| BMIa (kg/m2) | 29.9 [26.2-35.0] | 32.3 [28.0-37.8] | <0.001 | 29.5 [24.9-35.6] | 29.5 [25.3-36.2] | 0.6 |
| Obesity | 811 (49.5) | 1055 (63.9) | <0.001 | 98 (48.3) | 226 (47.6) | 0.9 |
| Hypertension | 1293 (78.9) | 1533 (92.9) | <0.001 | 200 (98.5) | 473 (99.6) | 0.1 |
| eGFR1 (mL/min/1.73m2) | 46.2 ± 14.7 | 43.7 ± 14.9 | <0.001 | 9.8 ± 4.1 | 9.8 ± 5.0 | 0.61 |
| baseline eGFR (mL/min/1.73m2) | 45.1 [35.6-56.0] | 42.7 [32.2-53.2] | <0.001 | 9.2 [6.5-12.5] | 9.0 [6.6-11.8] | 0.61 |
| Diabetes mellitus | 649 (39.6) | 848 (51.4) | <0.001 | 143 (70.4) | 334 (70.3) | 0.9 |
| MI or revascularization* | 376 (23.0) | 361 (21.9) | 0.5 | 105 (51.7) | 160 (33.7) | <0.001 |
| PVD * | 105 (6.4) | 117 (7.1) | 0.4 | 50 (24.6) | 82 (17.3) | 0.03 |
| Stroke * | 118 (7.2) | 227 (13.8) | <0.001 | 29 (14.3) | 101 (21.3) | 0.04 |
| Heart failure * | 117 (7.1) | 217 (13.2) | <0.001 | 81 (39.9) | 206 (43.4) | 0.4 |
| Cancer | 172 (10.5) | 82 (5.0) | <0.001 | 46 (22.7) | 46 (9.7) | <0.001 |
Values for continuous variables given as Mean ± SD or median [interquartile range]; values for categorical variables count (percentage).
1
Missing in n=183; eGFR was not carried forward from last visit
2
Supplemented from CMS-2728 form; data was carried forward from last CRIC visit if missing on form. IQR = interquartile range
a
BMI missing in N=9; serum albumin missing in N=55
*
self-report or adjudicated