OBJECTIVETo evaluate the renal function of 298 liver cirrhosis cases among the patient population of Beijing Ditan Hospital.

METHODSThe medical database of Beijing Ditan Hospital was retrospectively searched for patients with liver cirrhosis (compensated and decompensated). Patients were excluded from the study according to the presence of concomitant serious diseases, such as hypertension, diabetes, and malignancies.The consistency of renal insufficiency was evaluated by the glomerular filtration rate (eGFR) or serum creatinine (SCr) level, which were applied to the simplified modification of diet in renal disease (MDRD) equation.The renal function was compared between groups stratified according to compensated/decompensated status, sex, and age.The factors affecting renal insufficiency were screened.Measurement data were compared using the t-test and count data were compared using the chi-square test.Multiple sets of data were compared using analysis of variance.Correlations were assessed using multivariate logistic regression analysis, and the confounding variables were controlled with the Mantel-Haenszel method.

RESULTSA total of 298 hospitalized patients with liver cirrhosis were included in the study, among which 41 had compensated cirrhosis and 257 had decompensated cirrhosis.Twenty patients (6.7%) with renal insufficiency were identified by SCr measurement and 62 patients (20.8%) were identified by eGFR, and the number identified was significantly different between the two groups (x2=42.00, P less than 0.05).Fifty-six (21.8%) patients had decompensated cirrhosis and 6 (14.6%) patients had decompensated cirrhosis with renal dysfunction; the eGFR levels for these two groups were (117.75 +/- 32.60) ml/min/(1.73 m2)-1 and (112.72 +/- 24.01) ml/min/(1.73 m2) respectively and the difference was not statistically significant (P more than 0.05).The incidence of renal dysfunction among female patients was 22.7% (17/75), and the incidence among male patients was 20.2% (45/223); the eGFR levels for these two groups were (110.07 +/- 26.60) ml/min/(1.73 m2)1 and (112.49 +/- 33.05) ml/min/(l.73 m2) respectively, and the difference was not statistically significant (P more than 0.05).The rate of renal dysfunction among patients aged 20 to 40 years-old, more than 40 to 60 years-old, and more than 60 years years-old was 5.7% (4/70), 22.5% (40/178), and 36.0%(18/50) respectively; the eGFR values for these two groups were (123.43 +/- 24.42) ml min/(l.73 m2), (111.18+/- 33.57) ml/min/(1.73 m2), and (98.20 +/- 27.04) ml/min/(1.73 m2), and the differences were not statistically significant (P less than 0.05).After stratification of the study population by age, the patient sex and the cirrhosis stage were not significantly different (P more than 0.05).Multivariate logistic regression analysis identified age as a risk factor of hepatitis B-related cirrhosis and renal dysfunction (P less than 0.05).

CONCLUSIONThe simplified MDRD equation can help clinicians determine whether patients have kidney injury.Development of renal dysfunction in patients with liver cirrhosis is not associated with patient sex and cirrhosis stage, but is precisely correlated with patient age.