Table 1.
Baseline characteristics of 442,566 study subjects visiting local clinics and hospitals for health checkups.
| Characteristics | Data |
|---|---|
| Age, year (Mean, SD) | 50.1 (15.0) |
| Age group (n, %) | |
| 19–29 years | 46,882 (10.6) |
| 30–39 years | 73,217 (16.5) |
| 40–49 years | 105,633 (23.9) |
| 50–59 years | 92,879 (21.0) |
| 60–69 years | 76,935 (17.4) |
| 70–79 years | 37,313 (8.4) |
| ≥ 80 years | 9707 (2.2%) |
| SEX (n, %) | |
| Men | 205,236 (46.4) |
| Women | 237,330 (53.6) |
| Follow-up number (Mean, SD) | 1.1 (0.40) |
| Serum creatinine (mg/dL, Mean, SD) | 0.8 (0.33) |
| eGFR using MDRD 2006 (mL/min/1.73 m2, Mean, SD) | 92.2 (19.8) |
| eGFR using CKD-EPI 2009 (mL/min/1.73 m2, Mean, SD) | 97.1 (17.5) |
| eGFR using CKD-EPI 2021 (mL/min/1.73 m2, Mean, SD) | 100.8 (17.1) |
| Decreased eGFR (<60 mL/min/1.73 m2) | |
| Based on MDRD 2006 (n, %) | 15,208 (3.4%) |
| Based on CKD-EPI 2009 (n, %) | 12,482 (2.8%) |
| Based on CKD-EPI 2021 (n, %) | 9076 (2.1%) |
| Urine dipstick reagent strip protein test performed (n, %) | 26,608 (6.0%) |
| Urine albumin-creatinine ratio test performed (n,%) | 1151 (0.3%) |
| Both dipstick and albumin-creatinine ratio test performed (n, %) | 319 (0.1%) |
Abbreviations: SD, standard deviation; eGFR, estimated glomerular filtration rate.