Table 1.

Clinical and demographic characteristics of study population (n = 1214) at baseline

CharacteristicsMean ± SD or number (%)
Age, years56 ± 13
Women535 (44%)
Caucasians/African Americans604 (50%)/498 (41%)
Diabetes mellitus558 (46%)
Serum creatinine, mg/dl1.68 ± 0.57
Cystatin C, mg/L1.43 ± 0.51
iGFR, ml/min/1.73m249.2 ± 20.2
eGFR_Cr, ml/min/1.73m245.2 ± 14.1
eGFR_Cys, ml/min/1.73m256.9 ± 22.9
Hemoglobin level, g/dl12.7 ± 1.7
Anemia (hemoglobin <13 g/dl in men and <12 g/dl in women), n (%)566 (47%)
Potassium level, mmol/L4.3 ± 0.5
Hyperkalemia (potassium >5.3 mmol/L), n (%)44 (3.6%)
Bicarbonate level, mmol/L24 ± 3
Metabolic acidosis (bicarbonate <22 mmol/L), n (%)214 (18%)
Phosphate level, mg/dl3.7 ± 0.7
Hyperphosphatemia (phosphate >5 mg/dl), n (%)36 (3.0%)