Significance of combined detection of serum Cys-C and Hcy in the diagnosis of early renal injury in children ;with diabetes / 中国糖尿病杂志

ABSTRACT

Objective To investigate the combined detection of serum cystatin C (Cys‐C ) and homocysteine (Hcy) for the diagnosis of early renal damage in diabetic children. Methods Data of 97 cases of diabetic children were collected in our hospital. According to the levels of 24 hUAER ,diabetic children were divided into <30 mg group (n=34) ,30~299 mg group (n=42) ,and ≥300 mg group (n=21). 40 cases of healthy children were selected as control group (NC). Laboratory indexes were compared among different groups. The critical values of Cys‐C and Hcy in early diagnosis of renal damage were calculated by receiver operating curve (ROC). Results The levels of Cys‐C and Hcy in <30 mg group were significantly higher than in NC group [Cys‐C (1.04 ± 0.26 ) vs(0.79 ± 0.21 ) mg/L ,Hcy (13.09 ± 2.15) vs(8.57 ± 1.24)μmol/L ,respectively ,P< 0.05]. When Cys‐C cutoff point took 1.02 mg/L ,the diagnosis sensitivity for diabetic nephropathy diagnosis was 86.09% and the specificity was 83.28% ,the maximum diagnostic index reached 1.6937 ,ROC area under the curve was 0.841.When Hcy threshold took 13.00 μmol/L ,the sensitivity was 83.98% and the specificity was 79.24% ,with the maximum diagnostic index 1.6322 and ROC area 0.795.Cys‐C combined with Hcy had a sensitivity of 92.38% and a specificity of 89.17% ,with the maximum diagnostic index 1.764 and ROC area 0.928. Conclusion Cys‐C combined with Hcy detection for early diagnosis of renal injury in diabetic children has important clinical value.