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Table 5 Comparison between patients with and without nephrolithiasis (laboratory and ultrasonography characteristics)

From: Nephrolithiasis in gout: prevalence and characteristics of Brazilian patients

 Nephrolithiasis (N = 43)Without Nephrolithiasis (N = 80)P Value
Serum creatinine (mg/dL)1.26 ± 0.421.38 ± 0.610.507
Serum urea (mg/dL)41.7 ± 22.245.4 ± 26.80.387
eGFR – CKD EPI (mL/min/1.73 m2)68.0 ± 22.361.6 ± 21.10.116
Serum uric acid levels (mg/dL)7.20 ± 2.117.09 ± 1.870.785
Uric acid clearance (mL/min)5.25 ± 3.385.61 ± 4.180.518
 Uric acid clearance < 6 mL/min32 (74.4%)53 (67.1%)0.400
Urinary uric acid excretion (g/24 h)0.55 ± 0.330.52 ± 0.280.879
Serum glucose (mg/dL)111.3 ± 36.1102.6 ± 19.80.256
Serum total cholesterol (mg/dL)207.1 ± 57.7204.5 ± 44.80.924
Serum triglycerides (mg/dL)307.8 ± 639.3190.4 ± 156.30.627
Urinalysis
 pH5.87 ± 0.805.75 ± 0.850.383
 Pyuria (> 10 leukocytes/HPF)2 (4.7%)4 (5.0%)1.000
 Hematuria (>  3 erythrocytes/HPF)7 (16.3%)5 (6.2%)0.074
 Significant proteinuria1 (2.3%)4 (5.0%)0.657
Ultrasonography
 Cysts20 (46.5%)26 (32.5%)0.126
 CKD appearance3 (7.0%)7 (8.8%)1.000
  1. Data are expressed as the total (%) or the mean ± SD
  2. CKD Chronic kidney disease
  3. CKD – EPI Chronic Kidney Disease Epidemiology Collaboration equation
  4. eGFR estimated glomerular filtration rate
  5. HPF high-power field