Impact of isolated high home systolic blood pressure on diabetic nephropathy in patients with type 2 diabetes mellitus: A 5-year prospective cohort study
Abstract Background A previous 2-year cohort study has shown that isolated high home systolic blood pressure (IH-HSBP) may increase the risk of diabetic nephropathy. However, this association has not been previously assessed over medium to long term. Methods This prospective 5-year cohort study of 424 patients with normoalbuminuria investigated the effect of IH-HSBP on the risk of diabetic nephropathy in patients with type 2 diabetes mellitus. Diabetic nephropathy was defined as advancement from normoalbuminuira to micro- or macroalbuminuria. Results Among 424 patients, 75 developed diabetic nephropathy during the study period. Adjusted odds ratio of developing diabetic nephropathy because of IH-HSBP was 2.39 (95% confidence interval 1.15–4.96, p = 0.02). Sex; body mass index; duration of diabetes mellitus; and levels of hemoglobin A1c, total cholesterol, creatinine; and use of renin-angiotensin-aldosterone system inhibitors were included in the model as covariates. Conclusions IH-HSBP was associated with an increased risk of diabetic nephropathy among type 2 diabetes mellitus patients with normoalbuminuria over medium to long term. These findings suggest that IH-HSBP might be a useful marker in disease prognostication.