Table 2.
General characteristics of CKD outpatients in the J-CKD-DB at baseline.
| N | 39,121 |
| Age [IQI] (years) | 71 [62–79] |
| Age category | |
| 18–45 years | 2,424 (6.2%) |
| 45–64 years | 9,166 (23.4%) |
| 65–74 years | 12,303 (31.4%) |
| 75–84 years | 11,695 (9.9%) |
| ≥85 years | 3,533 (9.0%) |
| Gender: Male | 21,410 (54.7%) |
| eGFR [IQI] (mL/min/1.73 m2) | 51.3 [42.2–57.0] |
| eGFR stage | |
| G1 | 1,001 (2.6%) |
| G2 | 2,612 (6.7%) |
| G3a | 23,333 (59.6%) |
| G3b | 8,357 (21.4%) |
| G4 | 2,710 (6.9%) |
| G5 | 1,108 (2.8%) |
| Dipstick proteinuria | Overall: 19,055 |
| (−) | 9,357 (49.1%) |
| (±) | 3,126 (16.4%) |
| (1+) | 3,783 (19.9%) |
| (2+) | 1,919 (10.1%) |
| (3+) | 784 (4.1%) |
| (4+) | 86 (0.5%) |
| Haemoglobin (SD) (g/dL) | 13.2 (1.9) |
| Serum albumin (SD) (g/dL) | 4.1 (0.5) |
| Serum uric acid (SD) (mg/dL) | 5.9 (1.5) |
| Serum total cholesterol (mg/dL) | 186.4 (38.6) |
| Serum sodium (SD) (mEq/L) | 141.4 (2.8) |
| Serum potassium (SD) (mEq/L) | 4.3 (0.5) |
| Serum chloride (SD) (mEq/L) | 104.5 (3.3) |
| Serum calcium (SD) (mg/dL) | 9.1 (0.5) |
| Serum phosphate (SD) (mg/dL) | 3.4 (0.9) |
| Serum C-reactive protein [IQI] (mg/dL) | 0.10 [0.04–0.30] |
Continuous variables are described as median [inter-quartile interval, (IQI)] or mean (standard deviation, SD). Factors are described as n (%).