Table 2.
Baseline characteristics of the participants
| Variable | Value |
|---|---|
| Age, years | 45.0 (35.0, 55.0) |
| Gender, male, n (%) | 814 (62.8%) |
| Weight, kg | 62.0 (54.0, 70.0) |
| Height, cm | 165.0 (158.0,170.0) |
| Body surface area, m2 | 1.7 ± 0.2 |
| Body mass index, Kg/m2 | 22.9 (20.8, 25.4) |
| Serum creatinine, mg/dL | 1.5 (1.0, 3.2) |
| Serum cystatin C, mg/L | 1.7 (1.1, 2.9) |
| rGFR, mL/min/1.73 m2 | 46.8 (29.8, 68.3) |
| eGFR, mL/min/1.73 m2 | |
| eGFRscr | 49.7 (19.6, 85.8) |
| eGFRcys | 40.1 (19.2, 69.3) |
| eGFRscr_cys | 44.7 (18.6, 76.5) |
| eGFRa_MDRD | 48.9 (20.1, 81.0) |
| eGFRc_MDRD | 49.4 (19.1, 85.2) |
| eGFR_MDRD | 52.0 (21.6, 88.3) |
| rGFR based on CKD stage, mL/min/1.73 m2 | |
| Stage 1 (n = 104) | 101.4 (96.2, 111.2) |
| Stage 2 (n = 331) | 73.2 ± 8.6 |
| Stage 3 (n = 529) | 43.5 (37.0, 51.5) |
| Stage 4 (n = 220) | 23.6 (19.5, 27.0) |
| Stage 5 (n = 112) | 10.8 (8.5, 13.2) |
eGFR estimated glomerular filtration rate, rGFR reference glomerular filtration rate, CKD chronic kidney disease, MDRD modification of diet in renal disease, CKD-EPI chronic kidney disease epidemiology collaboration