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Table 1 Baseline characteristics of study participants

From: Discrepant glomerular filtration rate trends from creatinine and cystatin C in patients with chronic kidney disease: results from the KNOW-CKD cohort

Variables Total (n = 1069)
Age (years) 53.2 ± 12.1
Male (%) 60.4
Age-adjusted Charlson comorbidity index (%) 3.9 ± 1.8
 Low (≤3) 58.7
 Moderate (4–5) 27.2
 High (6–7) 12.3
 Very high (≥8) 1.8
Diabetes mellitus (%) 26.5
Hypertension (%) 96.4
Systolic blood pressure (mmHg) 126.1 ± 14.6
Diastolic blood pressure (mmHg) 76.4 ± 10.3
Body mass index (kg/m2) 24.5 ± 3.4
Body surface area (m2) 1.7 ± 0.2
Systolic blood pressure (mmHg) 126.1 ± 14.0
Diastolic blood pressure (mmHg) 76.4 ± 10.3
Cause of chronic kidney disease (%)
 Diabetic nephropathy 15.4
 Non-diabetic nephropathy 84.6
eGFR (ml/min/1.73 m2)
 eGFRCr 58.5 ± 28.9
 eGFRCysC 58.4 ± 31.2
 eGFRCrCysC 58.0 ± 30.6
Laboratory findings
 Hemoglobin (g/dL) 13.21 ± 1.85
 Blood urea nitrogen (mg/dL)  
 Uric acid (mg/dL) 6.90 ± 1.86
 Phosphorus (mg/dL)  
 Total bilirubin (mg/dL)  
 Albumin (g/dL) 4.26 ± 0.35
uPCR (mean, interquartile range) 0.4 (0.1–1.0)
  < 0.3 g/g (%) 45.0
 0.3–0.9 g/g (%) 30.6
 1.0–3.0 g/g (%) 18.8
  ≥ 3 g/g (%) 5.6
uACR (mean, interquartile range) 272.4 (49.7–705.1)
  < 30 mg/g (%) 19.2
 30–299 mg/g (%) 33.4
  ≥ 300 mg/g (%) 47.4
ESRD event (%) 69.0
  1. eGFR Estimated glomerular filtration rate; Cr Creatinine; CysC Cystatin C; uPCR Urine protein/creatinine ratio; uACR Urine albumin creatinine ratio