Table 1.
Baseline characteristics of the study population.
| Baseline characteristics | N = 2752 | |
|---|---|---|
| Female sex, n (%) | 1429 | 51.9 |
| Age, mean (SD) | 70.4 | 11.3 |
|
| ||
| Ethnicity, n (%) | ||
| Indigenous | 4 | 0.2 |
| African-American | 3 | 0.1 |
| Mestizo | 2745 | 99.7 |
|
| ||
| Education level, n (%) | ||
| Elementary or none | 787 | 28.6 |
| High school | 1781 | 64.7 |
| University degree | 284 | 6.7 |
|
| ||
| CKD etiology, n (%) | ||
| Hypertension | 1660 | 60.3 |
| Diabetes | 506 | 18.4 |
| Urinary tract obstruction | 122 | 4.4 |
| Glomerulonephritis | 84 | 3.1 |
| Polycystic kidney disease | 34 | 1.2 |
| Other | 222 | 8.1 |
| Unknown | 124 | 4.5 |
|
| ||
| History of cardiovascular disease, n (%) | 122 | 4.4 |
| Glomerular filtration rate ml/min/1.73 m2, mean (SD) | 43.2 | 9.8 |
| CKD stage G3, n (%) | 2436 | 88.5 |
| CKD stage G4, n (%) | 316 | 11.5 |
| Body mass index, mean (SD) kg/m2 | 26.8 | 4.3 |
| Systolic blood pressure mmHg, mean (SD) | 134.4 | 20.8 |
| Diastolic blood pressure mmHg, mean (SD) | 74.4 | 11.7 |
| Serum albumin g/dL mean (SD) | 4.2 | 0.3 |
| Hemoglobin g/dL mean (SD) | 14.3 | 1.9 |
| Blood urea nitrogen mg/dL, median (IQR) | 25 | 21, 33 |
| Uric acid mg/dL mean (SD) | 6.7 | 1.6 |
| Glycosylated hemoglobin %, median (IQR) ∗ | 7 | 6, 8 |
| LDL cholesterol mg/dL, median (IQR) | 114 | 91, 1 |
| 24-hours proteinuria, g/L, median (IQR) ∗∗ | 0.1 | 0.1, 0.4 |
| Use of ACEIs and ARBs, n (%) | 450 | 16.4 |
| Follow-up time, years, median (IQR) | 5.2 | 3.1, 7.1 |
∗Data available only in diabetes patients. ∗∗Data available in 1795 patients. CKD: chronic kidney disease; ACEIs: angiotensin-converting enzyme inhibitors; ARBs: angiotensin ii receptor blockers; LDL: low-density lipoprotein.