Objective: To compare arterial stiffness between diabetic kidney disease and non-diabetic kidney diseaseand to identify factors predicting ambulatory arterial stiffness index (AASI).
Methods: Forty-four patients with diabetic kidney disease (DKD group) and thirty-one patients with non-diabetic kidney disease (NDKD group) were recruited for this study. All of the participants had hypertension. The AASI (indirect reflex global arterial stiffness)and short-term blood pressure variability (BPV) were measured using a 24-h ambulatory BP monitoring, and compared.between DKD and NDKD groups using analyses of covariance, correlation analysis and multivariate linear regression model.
Results: DKD patients had significantly higher levels of AASI than NDKD patients (0.55 +/- 0.14 vs. 0.45 +/- 0.16, P < 0.05). The 24-h systolic and daytime systolic BP variability of DKD patients was also higher than NDKD patients. In DKD patients, the correlation analysis revealed that the AASI showed association with 24-h systolic BP variability (24 hSBPV), 24-h diastolic BP variability (24 hDBPV),daytime diastolic BP variability (dDBPV), nighttime systolic BP variability (nSBPV) and nighttime diastolic BP variability (nDBPV), and nDBPV and age showed strong associations with AASI.
Conclusion: Although both DKD and NDKD patients suffered from arterial stiffness, greater AASI and short-term BPV was detected in DKD patients. AASI is associated with nDBPV and age. Optimal short-term BPV control in hypertensive type 2 diabetic patients with overt nephropathy may improve arterial elasticity.
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