Clinical studies and laboratory data
The following parameters were collected at the time of the renal biopsy,
including gender, age, blood pressure, hematuria, proteinuria, serum
uric acid, serum albumin, blood urea nitrogen, serum creatinine and
eGFR. To assess the presence of hematuria, 10 ml of clean fresh urine
that came from the middle piece was centrifuged for 5 minutes at 1500
rpm; 0.2 ml of sediment was taken and observed under microscopy. The
severity of erythrocyturia was characterized as follows:
>20 RBC/HPF as 3+.
The estimated glomerular
filtration rate (eGFR) was calculated using the CKD-epidemiology
collaboration (CKD-EPI) formula: eGFR (ml/min per1.73 m2) =
186×Scr-1.154×age-0.203×0.742 (if
female) × 1.227