| Summary: | The aim of the present study was to evaluate the association be tween adenosine deaminase (ADA) levels and diabetic kidney disease (DKD) in pat ients with type 2 diabetes (T2D). In this study, patients with T2D who had been screened f or DKD were recruited. Patients with an estimated glomerular filtration rate (eGFR) < 6 0 mL/min/1.73 m2 or a urinary albumin-to-creatinine ratio (UACR) ≥ 30 mg/g for 3 months were identified as having DKD. The prevalence of DKD was 13.3%, and the range of s erum ADA levels was 4–37 U/L. Serum ADA levels were positively associated with cyst atin C levels and UACR (r = 0.295 and r = 0.302, respectively, both P < 0.05) and negatively associated with eGFR (r = −0.342, P < 0.05). The proportion of participants with DKD increased signifi cantly from 3.8% in the first tertile (T1) to 13.6% in the second tertile (T 2) and 25.9% in the third tertile (T3) of ADA (P for trend < 0.001). After adjusting for clinical risk factors for DKD via multiple logistic regression, the corresponding odds ratios (ORs) of DKD for the participants in T2 and T3 vs those in T1 of ADA were 5.123 (1.282–20.474) and 1 0.098 (1.660–61.431), respectively. Receiver operating characteristic (ROC) analysis revealed that the optimal cutoff value of ADA to indicate DKD was 10 U/L. Its correspondin g sensitivity and specificity were 75.5 and 56.4%, respectively. Our results demonstrated tha t serum ADA levels were closely associated with DKD and partly reflect the risk of DKD i n patients with T2D.
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