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Table 1 Baseline characteristics according to quintile of serum uric acid level (n = 9405)

From: High serum uric acid level is a mortality risk factor in peritoneal dialysis patients: a retrospective cohort study

Variants   Serum uric acid level (mg/dl)   
Total (n = 9405) < 6.06 (n = 1,865) 6.06–6.67 (n = 1,877) 6.68–7.27 (n = 1,892) 7.28–8.03 (n = 1,878) ≥8.04 (n = 1,893) P Value N(%)
Age (yr) 52.5 ± 14.6 55.5 ± 15.1 52.7 ± 14.5 51.6 ± 14.5 51.7 ± 14.0 51.0 ± 14.3 < 0.001 9405 (100)
Men (N, %) 5166 (54.9) 822 (44.1) 933 (49.7) 1012 (53.5) 1159 (61.7) 1240 (65.5) < 0.001 9405 (100)
BMI (kg/m2) 21.7 ± 3.2 21.0 ± 3.2 21.4 ± 2.9 21.9 ± 3.1 22.1 ± 3.3 22.4 ± 3.3 < 0.001 8456 (89.9)
Hemoglobin (g/L) 97.6 ± 12.2 97.8 ± 12.2 98.1 ± 11.5 97.6 ± 11.7 97.7 ± 11.5 96.8 ± 13.4 0.013 9393 (99.9)
Albumin (g/L) 35.5 ± 5.3 34.2 ± 5.7 35.4 ± 5.1 35.7 ± 5.0 36.1 ± 5.1 36.2 ± 5.3 < 0.001 9260 (98.5)
Creatinine (mg/dL) 9.6 ± 3.2 8.6 ± 3.0 9.6 ± 3.1 9.8 ± 3.1 9.9 ± 3.3 9.9 ± 3.5 < 0.001 9405 (100)
Calcium (mmol/L) 2.21 ± 0.19 2.21 ± 0.19 2.24 ± 0.18 2.22 ± 0.19 2.22 ± 0.19 2.19 ± 0.20 < 0.001 9334 (99.2)
Phosphorus (mmol/L) 1.59 ± 0.36 1.44. ± 0.36 1.55. ± 0.32 1.61 ± 0.33 1.64 ± 0.34 1.70 ± 0.37 < 0.001 9322 (99.1)
Potassium (mmol/L) 4.21 ± 0.47 4.13 ± 0.49 4.17 ± 0.46 4.24 ± 0.45 4.25 ± 0.46 4.28 ± 0.47 < 0.001 9334 (99.2)
Natrium (mmol/L) 140.37 ± 2.26 140.00 ± 2.48 140.30 ± 2.19 140.49 ± 2.01 140.51 ± 2.18 140.56 ± 2.33 < 0.001 9324 (99.1)
PTH (pg/mL) 304.1 ± 221.3 269.19 ± 207.9 299.6 ± 223.4 325.4 ± 231.9 311.4 ± 221.7 314.0 ± 216.5 < 0.001 9253 (98.4)
RRF (mL/min/1.73m2) 6.76 ± 3.13 7.19 ± 3.46 6.60 ± 3.04 6.57 ± 3.01 6.82 ± 3.09 6.67 ± 2.99 < 0.001 7766 (82.6)
AKP (U/L) 80.1 ± 43.9 83.0 ± 42.4 79.3 ± 45.3 78.5 ± 41.0 78.9.1 ± 34.6 81.3 ± 53.4 0.676 1762 (18.7)
Uric acid (mg/dL) 7.1 ± 1.2 5.5 ± 0.5 6.4 ± 0.2 7.0 ± 0.2 7.6 ± 0.2 8.9 ± 0.8 < 0.001 9405 (100)
FPG (mmol/L) 5.8 ± 1.6 6.1 ± 1.9 5.8 ± 1.6 5.7 ± 1.5 5.8 ± 1.5 5.6 ± 1.6 < 0.001 9047 (96.2)
HbA1c(%) 6.5 ± 3.9 6.3 ± 2.5 6.2 ± 2.4 6.6 ± 3.7 6.8 ± 6.0 6.5 ± 3.4 0.029 3250 (34.6)
DM(N,%) 1147 (12.2) 274 (14.7) 242 (12.9) 207 (10.9) 225 (12.0) 199 (10.5) 0.001 9405 (100)
CVD(N,%) 474 (5.0) 114 (24.1) 94 (19.8) 81 (17.1) 97 (20.5) 88 (18.6) 0.115 9405 (100)
Primary kidney disease        < 0.001  
Glomerulonephritis(N,%) 5073 (53.9) 889 (17.5) 995 (19.6) 1045 (20.6) 1038 (20.5) 1106 (21.8)   
Diabetic nephropathy(N,%) 826 (8.8) 196 (23.7) 187 (22.6) 160 (19.4) 161 (19.5) 122 (14.8)   
Renal vascular(N,%) 335 (3.6) 72 (21.5) 59 (17.6) 75 (22.4) 72 (21.5) 57 (17.0)   
Obstructive nephropathy(N,%) 77 (0.8) 14 (18.2) 9 (11.7) 14 (18.2) 21 (27.3) 19 (24.6)   
Polycystic kidney disease (N,%) 133 (1.4) 31 (23.3) 40 (30.1) 19 (14.3) 22 (16.5) 21 (15.8)   
Other(N,%) 2961 (31.5) 663 (22.4) 587 (19.8) 579 (19.6) 564 (19.0) 568 (19.2)   
Follow-up duration (mo) 34.5 ± 23.2 35.2 ± 24.1 37.5 ± 24.2 36.3 ± 23.4 33.7 ± 22.0 29.9. ± 21.3 < 0.001 9405 (100)
All-cause death (N,%) 1226 (13.0) 334 (17.9) 245 (13.1) 185 (9.8) 226 (12.0) 236 (12.5) < 0.001 9405 (100)
Cardiovascular death(N,%) 515 (5.5) 131 (7.0) 114 (6.1) 82 (4.3) 86 (4.6) 102 (5.4) 0.001 9405 (100)
  1. Note: Values are presented as mean ± standard deviation or number (%)
  2. Abbreviations: BMI body mass index, PTH Parathyroid hormone, RRF Residual renal function, AKP alkaline phosphatase, FPG fasting plasma glucose, DM diabetes mellitus, CVD cardiovascular disease