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Horm Metab Res 2002; 34(9): 509-515
DOI: 10.1055/s-2002-34791
Original Clinical
© Georg Thieme Verlag Stuttgart · New York

Effects of Lifestyle Modifications on Patients with Type 2 Diabetes: The Japan Diabetes Complications Study (JDCS) Study Design, Baseline Analysis and Three Year-Interim Report

H.  Sone 1 , A.  Katagiri 2 , S.  Ishibashi 3 , R.  Abe 4 , Y.  Saito 5 , T.  Murase 6 , H.  Yamashita 7 , Y.  Yajima 8 , H.  Ito 9 , Y.  Ohashi 10 , Y.  Akanuma 11 , N.  Yamada 1 , JDC Study Group
  • 1Department of Internal Medicine, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan
  • 2Department of Pharmacoepidemiology, School of Health Sciences and Nursing, University of Tokyo, Tokyo, Japan
  • 3Department of Metabolic Disease, School of Medicine, University of Tokyo, Tokyo, Japan
  • 4Ohta Nishinouchi Hospital, Koriyama, Fukushima, Japan
  • 5The Second Department of Internal Medicine, School of Medicine, Chiba University, Chiba, Japan
  • 6Toranomon Hospital, Tokyo, Japan
  • 7Department of Ophthalmology, School of Medicine, Yamagata University
  • 8Department of Internal Medicine, School of Medicine, Kitasato University, Sagamihara, Kanagawa
  • 9Tokyo Metropolitan Geriatric Hospital, Tama, Tokyo, Japan
  • 10Department of Biostatistics/Epidemiology and Preventive Health Sciences, School of Health Sciences and Nursing, University of Tokyo, Tokyo, Japan
  • 11Institute for Diabetes Care and Research, Asahi Life Foundation, Tokyo, Japan
H. Sone and A. Katagiri equally contributed to this study.
Further Information

Publication History

Received: 17 October 2001

Accepted after revision: 7 May 2002

Publication Date:
17 October 2002 (online)

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Abstract

Background: Lifestyle modifications may affect the development of diabetes and prevent complications. However, there is no direct evidence to show that lifestyle intervention is beneficial for patients with established type 2 diabetes. Objective: The ultimate goal is to determine whether long-term lifestyle intervention can improve glycemic control and prevent complications in patients with type 2 diabetes. This initial report on a multi-year study describes protocols and the analysis of baseline data and three-year interim results. Design: The study was a randomized, controlled, multi-centre, prospective intervention trial. The trial included patients from 59 Japanese institutes specializing in diabetes care. Patients: The study enrolled 2 205 patients with previously diagnosed type 2 diabetes. Intervention: The lifestyle modification program included intensive lifestyle management at each outpatient clinic visit and frequent telephone counseling. The intervention group received educational materials concerning the importance of lifestyle and behavioural changes, a diary to record progress of laboratory and other data, and a pedometer. Measurements: Parameters and indices related to glycemic control, diabetic complications, dyslipidemia, hypertension, obesity, and atherosclerosis were measured several times a year. Results: Small but significant differences in HbA1c levels between the intervention (INT) and conventional (CON) therapy groups appeared as early as two years after the start of intervention and were maintained in the third year (CON group, 7.78 ± 1.27 % vs. INT group, 7.62 ± 1.20 %, the initial HbA1c level was 7.80 ± 1.42 % for the CON group and 7.68 ± 1.28 % for the INT group). Data on differences in occurrence of micro- or macrovascular complications are not yet available. Conclusions: The effect of lifestyle modification on improving the glycemic control of patients with established type 2 diabetes mellitus was small but significant three years after initiation of the intervention.

Key words

The Japan Diabetes Complications Study (JDCS) - Lifestyle Modification - Randomized Prospective Intervention Trial - Glycemic Control

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Prof. N. Yamada, M.D., Ph.D.

Department of Internal Medicine · Institute of Clinical Medicine · University of Tsukuba

1-1-1 Tennodai, Tsukuba, Ibaraki · Japan (305-8575) ·

Fax: + 81 (298) 3051, 3053

Email: ymdnbhr@md.tsukuba.ac.jp

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