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Effects of renal dysfunction on cardiovascular events in diabetic patients with hypertension: challenge-DM Study
Satoshi Umemura1, Ryuzo Kawamori, Hiroaki Matsuoka
1Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Japan. umemuras@med.yokohama-cu.ac.jp
Insights
Low estimated glomerular filtration rate (eGFR) is a risk factor for cardiovascular events in younger Japanese diabetic patients with hypertension. This risk was not observed in older patients.
Area of Science:
- Nephrology
- Cardiology
- Endocrinology
Background:
- Investigated the link between renal dysfunction and cardiovascular events in Japanese diabetic patients with hypertension on candesartan therapy.
- Utilized data from the large-scale Challenge-DM Study.
Purpose of the Study:
- To determine if low estimated glomerular filtration rate (eGFR) is an independent risk factor for cardiovascular events.
- To analyze this relationship across different age groups.
Main Methods:
- Assessed renal function (eGFR) in 4706 patients from the Challenge-DM Study.
- Defined renal dysfunction as eGFR <60 ml/min/1.73 m(2).
- Employed univariate and multivariate Cox regression analyses, considering patient characteristics and treatment targets.
Main Results:
- Patients with low eGFR were older, more likely female, and had a higher prevalence of cardiovascular disease (CVD).
- Low eGFR was associated with increased cardiovascular events in univariate analysis.
- Multivariate analysis indicated low eGFR significantly influenced events in patients <65 years old, but not in those ≥65 years old.
Conclusions:
- Low estimated glomerular filtration rate (eGFR) may be an independent risk factor for cerebrovascular and cardiovascular events.
- This association is significant in younger and middle-aged Japanese diabetic patients with hypertension on candesartan therapy.
Background:
This study investigated the relation between renal dysfunction and cardiovascular events in patients from the Challenge-DM Study (a large-scale investigation of Japanese diabetic patients with hypertension on candesartan therapy).
Methods:
The subjects were 4706 patients in whom renal function could be assessed at the time of registration among 16860 patients analyzed in the Challenge-DM Study. The definition of renal dysfunction (low GFR) was an estimated glomerular filtration rate (eGFR) <60 ml/min/1.73 m(2) calculated by the formula for Japanese.
Results:
The low GFR group was older, and had a high proportion of females and a high prevalence of cerebrovascular or cardiovascular disease (CVD) compared to the normal GFR group (eGFR ≥ 60 ml/min/1.73 m(2)). Univariate Cox regression analysis of cardiovascular events showed a significant increase in the incidence of primary events and total events in the low GFR group. Among patients <65 years old, the same results were obtained, but no differences were found between the low GFR and normal GFR groups aged over 65 years. Multivariate Cox regression analysis was done with patient characteristics at registration and the presence/absence of achieving the target blood pressure and HbA(1c) before the event as explanatory variables. As a result, low GFR was not the main cause of cardiovascular events, but it had a significant influence on primary events and total events among patients <65 years old.
Conclusions:
Low GFR may be an independent risk factor for cerebrovascular and CVD among young and middle-aged Japanese diabetic patients with hypertension on candesartan therapy.
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