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Table 1 The demographic characteristics of enrolled patients in the study

From: Roles of peritoneal clearance and residual kidney removal in control of uric acid in patients on peritoneal dialysis

VariablesTotal
(n = 180)
Lower peritoneal UA clearance (n = 90)Higher peritoneal UA clearance (n = 90)P value
Peritoneal UA clearance(L/week/1.73 m2)40.2 ± 7.134.6 ± 3.545.8 ± 5.0
Age (y)45.0 ± 13.442.9 ± 13.247.1 ± 13.30.04
Male (n, %)95 (52.8)55 (61.1)40 (44.4)0.04
Diabetes (n, %)24 (13.3)13 (14.4)11 (12.2)0.83
CVD (n, %)25 (13.9)10 (11.1)15 (16.7)0.39
Charlson comorbidity score3 (2–4)2 (2–4)3 (2–4)0.09
Chronic glomerulonephritis (n, %)121 (67.2)63 (70.0)58 (64.4)0.53
Diabetic nephropathy (n, %)16 (8.9)8 (8.9)8 (8.9)1.00
Hypertensive kidney lesion (n, %)14 (7.8)5 (5.6)9 (10.0)0.41
Systolic pressure (mmHg)135.0 ± 18.0134.6 ± 17.4135.5 ± 18.70.73
Diastolic pressure (mmHg)85.5 ± 14.287.5 ± 12.783.5 ± 15.40.06
Hemoglobin (g/dL)11.2 ± 1.711.4 ± 1.611.0 ± 1.70.11
N/L3.5 (2.7–4.5)3.2 (2.6–4.2)3.7 (2.9–4.8)0.11
HsCRP (mg/L)1.4 (0.5–4.7)1.5 (0.6–4.9)1.3 (0.5–4.8)0.79
Serum albumin (g/dL)3.7 ± 0.43.8 ± 0.33.5 ± 0.4<0.001
Serum prealbumin (mg/L)351 (320–402)354 (319–406)347 (319–387)0.26
Corrected calcium (mg/dL)9.2 ± 1.09.1 ± 0.69.3 ± 1.20.22
Serum phosphorus (mg/dL)4.5 ± 1.34.5 ± 1.14.5 ± 1.50.93
Total cholesterol (mg/dL)193.4 (162.4–228.2)193.4 (158.5–230.1)193.4 (166.3–228.2)0.62
Triglyceride (mg/dL)136.4 (97.8–190.8)142.1 (102.7–196.8)131.9 (94.7–185.1)0.27
Serum urea nitrogen (mg/dL)45.5 (37.5–55.7)45.4 (37.7–55.8)45.9 (36.6–55.9)0.91
Serum creatinine (mg/dL)8.6 (7.3–10.8)8.4 (7.1–10.8)8.9 (7.3–10.9)0.75
iPTH (pg/mL)256.2 (149.4–401.4)256.2 (164.0–391.1)258.0 (139.6–454.3)0.82
Serum UA (μmol/L)410 ± 72430 ± 71391 ± 69< 0.001
BMI (kg/m2)21.8 ± 3.222.6 ± 3.221.0 ± 3.00.001
Diuretic use (n, %)27 (15.0)11 (12.2)16 (17.8)0.40
  1. Values are presented as means ± standard deviation or medians (interquartile range) for continuous variables and count (percentage) for categorical variables. Enrolled patients were divided into lower peritoneal UA clearance (≤39.8 L/week/1.73m2) and higher peritoneal UA clearance (> 39.8 L/week/1.73m2) group according to its median level
  2. Abbreviations: BMI body mass index, CVD cardiovascular disease, HsCRP high sensitivity C-reactive protein, iPTH intact parathyroid hormone, N/L neutrophil to lymphocyte ratio, UA, uric acid