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Articles by T. Babazono
Total Records ( 2 ) for T. Babazono
  R. Bouchi , T. Babazono , N. Yoshida , I. Nyumura , K. Toya , T. Hayashi , K. Hanai , N. Tanaka , A. Ishii and Y. Iwamoto
  Aims  Silent cerebral infarction (SCI) is an independent risk factor for future symptomatic stroke. Although the prevalence of SCI is closely related to kidney function in non-diabetic individuals, evidence is lacking whether albuminuria and/or reduced estimated glomerular filtration rate (eGFR) independently increase the risk of SCI in diabetic patients. We therefore examined the relationships between albuminuria, eGFR and SCI in patients with Type 2 diabetes mellitus (T2DM).

Methods  We studied 786 T2DM patients with an eGFR ≥ 15 ml/min 1.73/m2, including 337 women and 449 men [mean (± sd), age 65 ± 11 years]. All patients underwent cranial magnetic resonance imaging (MRI) to detect SCI. GFR was estimated using the modified three-variable equation for Japanese subjects. Albuminuria was defined as a first morning urinary albumin-to-creatinine ratio (ACR) ≥ 30 mg/g.

Results  SCI was detected in 415 (52.8%) of the subjects. The prevalence of SCI was significantly associated with both elevated ACR and decreased eGFR in univariate analysis. In multivariate logistic regression analysis, urinary ACR remained independently associated with SCI after adjusting for conventional cardiovascular risk factors [odds ratio (OR) of urinary ACR per logarithmical value: 1.89, 95% confidence interval (CI) = 1.41-2.51, P < 0.001]; however, eGFR was no longer significantly associated with SCI (OR per ml/min 1.73/m2 = 0.99, 95% CI = 0.98-1.00, P = 0.095).

Conclusion  In conclusion, albuminuria but not decreased eGFR may be an independent predictor of prevalent SCI in patients with T2DM.

  M. Ohta , T. Babazono , Y. Uchigata and Y. Iwamoto
  Aims  The relationship between type of diabetes and risk of chronic kidney disease has not been studied in detail. We conducted this study to determine the prevalence of chronic kidney disease in Japanese adults with diabetes, with a particular emphasis on the comparison of Type 1 and Type 2 diabetes.

Methods  We studied 3,575 Japanese patients with diabetes, 504 with Type 1 (mean ± SD age 38 ± 13 years; 350 women and 154 men) and 3071 with Type 2 diabetes (60 ± 13 years; 1187 women and 1884 men). Prevalence rates of albuminuria [urinary albumin/creatinine ratio (≥ 30 mg/g], decreased estimated glomerular filtration rate (eGFR < 60 ml/min/1.73 m2) and chronic kidney disease (defined as albuminuria and/or decreased eGFR) were compared between the two diabetic groups.

Results  The prevalence of albuminuria was higher in Type 2 than Type 1 diabetic patients by both Fisher's exact test (36.1 vs. 15.9%, P < 0.001) and multivariate logistic regression analysis [adjusted odds ratio (OR) = 1.482, 95% confidence interval (CI) = 1.050-2.091, P = 0.025]. The prevalence of decreased eGFR was also higher in Type 2 diabetic patients (25.2 vs. 7.9%, P < 0.001); however, the statistical significance disappeared after adjusting for covariates, including age (OR = 0.656, 95% CI = 0.395-1.088, P = 0.102). The prevalence of chronic kidney disease was also higher in Type 2 diabetic patients (46.0 vs. 19.1%, P < 0.001); however, the statistical significance disappeared in the multivariate analysis.

Conclusions  Type 2 diabetic patients are more than twice as likely as Type 1 diabetic patients to have chronic kidney disease due to an age-independent higher prevalence of albuminuria and age-dependent decreased eGFR.

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