Table 1.
Baseline characteristics of participants in the Chronic Kidney Disease-Renal Epidemiology and Information Network
| Characteristics | All, n=3033 | Baseline eGFR, ml/min per 1.73 m2 | Participants with Missing Data,a %, n=3033 | |
|---|---|---|---|---|
| ≥30, n=1670 | <30, n=1363 | |||
| Age, yr | 69 [60–76] | 68 [59–75] | 70 [61–78] | 0 |
| <60 | 716 (24%) | 421 (25%) | 295 (22%) | |
| 60–75 | 1400 (46%) | 803 (48%) | 597 (44%) | |
| ≥75 | 917 (30%) | 446 (27%) | 471 (35%) | |
| Men | 1982 (65%) | 1121 (67%) | 861 (63%) | 0 |
| High school diploma or higher | 1094 (36%) | 648 (39%) | 446 (33%) | 1.7 |
| BMI | 28 [25–32] | 28 [25–32] | 28 [25–32] | 2.1 |
| ≥30 kg/m2 | 1075 (35%) | 573 (34%) | 502 (37%) | |
| Serum albumin | 4.0 [3.8–4.3] | 4.1 [3.8–4.3] | 4.0 [3.7–4.3] | 18.9 |
| <3.5 g/dl | 293 (10%) | 138 (8%) | 155 (11%) | |
| UACR, mg/g | 11.2 | |||
| <30 | 846 (28%) | 625 (37%) | 221 (16%) | |
| 30–300 | 955 (31%) | 540 (32%) | 415 (31%) | |
| >300 | 1232 (41%) | 505 (31%) | 727 (53%) | |
| Anemiab | 1236 (41%) | 490 (29%) | 746 (55%) | 0.9 |
| Smoking status | 0.8 | |||
| Smoker | 360 (12%) | 197 (12%) | 163 (12%) | |
| Nonsmoker | 1252 (41%) | 701 (42%) | 551 (40%) | |
| Ex-smoker | 1421 (47%) | 773(46%) | 648 (48%) | |
| Diabetes | 1304 (43%) | 702 (42%) | 602 (44%) | 0.2 |
| AKI history | 710 (23%) | 350 (21%) | 360 (26%) | 8.0 |
| Cardiovascular history | 1611 (53%) | 854 (51%) | 757 (56%) | 1.4 |
| Hypertension | 2751 (91%) | 1493 (89%) | 1258 (92%) | 0.2 |
| Dyslipidemia | 2229 (73%) | 1216 (73%) | 1011 (74%) | 0.5 |
| No. of drugs | 8 [5–10] | 7 [5–10] | 8 [6–11] | 0.6 |
| <5 | 593 (19%) | 412 (25%) | 181 (13%) | |
| 5–10 | 1694 (56%) | 915 (54%) | 779 (57%) | |
| >10 | 747 (25%) | 344 (21%) | 403 (30%) | |
| Poor adherence to medications | 1888 (62%) | 1010 (60%) | 878 (64%) | 1.0 |
Median (interquartile range) or n (%). BMI, body mass index; UACR, urine albumin-creatinine ratio.
a
Missing data were imputed as specified in Materials and Methods.
b
Anemia is defined by the 1968 World Health Organization (51) definition: <12 g/dl for women and <13 g/dl for men.