Table 2. General characteristics of study cohort upon enrollment.
| N | 35,508 |
|---|---|
| Age (years) | 72.0 [64.0–79.0] |
| Age category | |
| 18–45 years | 1,173 (3.3%) |
| 45–64 years | 7,966 (22.4%) |
| 65–74 years | 11,628 (32.7%) |
| 75–84 years | 11,309 (31.8%) |
| ≥ 85 years | 3,432 (9.7%) |
| Gender: men | 19,360 (54.5%) |
| eGFR (ml/min/1.73m2) | 50.0 [40.9–55.6] |
| eGFR stage | |
| G3a | 23,333 (65.7%) |
| G3b | 8,357 (23.5%) |
| G4 | 2,710 (7.6%) |
| G5 | 1,108 (3.1%) |
| Dipstick proteinuria | Overall: 15,442 |
| (-) | 9,357 (60.6%) |
| (±) | 2,295 (14.9%) |
| (1+) | 1,849 (12.0%) |
| (2+) | 1,277 (8.3%) |
| (3+) | 598 (3.9%) |
| (4+) | 66 (0.4%) |
| Hemoglobin (g/dL) | 13.02 (1.88) |
| Serum albumin (g/dL) | 4.04 (0.47) |
| Serum uric acid (mg/dL) | 6.05 (1.49) |
| Serum total cholesterol (mg/dL) | 187.9 (38.3) |
| Serum sodium (mEq/L) | 141.0 (2.84) |
| Serum potassium (mEq/L) | 4.41 (0.54) |
| Serum chloride (mEq/L) | 104.6 (3.34) |
| Serum calcium (mg/dL) | 9.08 (0.54) |
| Serum phosphate (mg/dL) | 3.52 (0.94) |
| Serum C-reactive protein (mg/dL) | 0.10 [0.04–0.28] |
Continuous variables are expressed as median [interquartile interval] or mean (standard deviation). Factors are expressed as n (%).
Abbreviation: eGFR, estimated glomerular filtration rate.