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Hypertension Research
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Chronic Kidney Disease Japan Cohort (CKD-JAC) Study: Design and Methods
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  • Original Article
  • Published: 01 June 2008

Chronic Kidney Disease Japan Cohort (CKD-JAC) Study: Design and Methods

  • Enyu Imai1,
  • Seiichi Matsuo2,
  • Hirofumi Makino3,
  • Tsuyoshi Watanabe4,
  • Tadao Akizawa5,
  • Kosaku Nitta6,
  • Satoshi Iimuro7,
  • Yasuo Ohashi7 &
  • Akira Hishida8
  • for the CKD-JAC Study Group

Hypertension Research volume 31, pages 1101–1107 (2008)Cite this article

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Abstract

The prevalence and incidence of end-stage renal disease (ESRD) in Japan are the highest and the third highest, respectively, in the world, while the incidence of cardiac death in Japan is the lowest among developed countries. A recent study showed that the prevalence of chronic kidney disease (CKD), defined as an estimated glomerular filtration rate (GFR) of less than 60 mL/min/1.73 m2, is extremely high in Japan, about 20% of the adult population. However, the risk of ESRD and cardiovascular disease (CVD) in the CKD population has not been determined nationwide. For this observational study, we will establish a Chronic Kidney Disease Japan Cohort (CKD-JAC) by enrolling 3,000 patients with CKD in 17 clinical centers around Japan, which will be used to determine the incidence of ESRD and CVD in Japanese CKD patients. Risk factors associated with the development of CVD will also be examined. Comorbidity of diabetes in CKD patients will be analyzed to determine whether it is a risk for rapid progression of CKD and high incidence of CVD. In addition, we will study whether the burden of CKD decreases the QOL of patients, and increases hospitalization or health resource utilization. Insights from the CKD-JAC study will provide a basis for future interventional trials focused on reducing the burden of ESRD and CVD in patients with CKD in Japan.

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Author information

Authors and Affiliations

  1. Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Japan

    Enyu Imai

  2. Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan

    Seiichi Matsuo

  3. Department of Medicine and Clinical Science, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan

    Hirofumi Makino

  4. Third Department of Internal Medicine, Fukushima Medical College, Fukushima, Japan

    Tsuyoshi Watanabe

  5. Department of Nephrology, Showa University School of Medicine, Tokyo, Japan

    Tadao Akizawa

  6. Department of Medicine, Kidney Center, Tokyo Women’s Medical University, Tokyo, Japan

    Kosaku Nitta

  7. Department of Biostatistics, School of Public Health, The University of Tokyo, Tokyo, Japan

    Satoshi Iimuro & Yasuo Ohashi

  8. First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan

    Akira Hishida

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for the CKD-JAC Study Group

Corresponding author

Correspondence to Enyu Imai.

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Cite this article

Imai, E., Matsuo, S., Makino, H. et al. Chronic Kidney Disease Japan Cohort (CKD-JAC) Study: Design and Methods. Hypertens Res 31, 1101–1107 (2008). https://doi.org/10.1291/hypres.31.1101

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  • Received: 26 November 2007

  • Accepted: 16 January 2008

  • Issue date: 01 June 2008

  • DOI: https://doi.org/10.1291/hypres.31.1101

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Keywords

  • cardiovascular disease
  • stroke
  • heart failure
  • proteinuria
  • time to event analysis

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