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Original Articles

Lifestyle Intervention in Overweight Individuals With a Family History of Diabetes

  1. Rena R Wing, PHD,
  2. Elizabeth Venditti, PHD,
  3. John M Jakicic, PHD,
  4. Betsy A Polley, MS and
  5. Wei Lang, BS
  1. Department of Psychiatry, University of Pittsburgh School of Medicine Pittsburgh, Pennsylvania
  1. Address correspondence and reprint requests to Dr. Rena R. Wing, University of Pittsburgh School of Medicine, 3811 O'Hara St., Pittsburgh, PA 15213.
Diabetes Care 1998 Mar; 21(3): 350-359. https://doi.org/10.2337/diacare.21.3.350
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Abstract

OBJECTIVE To assess the effect of lifestyle intervention over 2 years on changes in weight, coronary heart disease (CHD) risk factors, and incidence of diabetes in overweight individuals with a parental history of diabetes.

RESEARCH DESIGN AND METHODS Participants (n = 154), who were 30–100% over ideal body weight, had one or both parents with diabetes, and were currently nondiabetic, were randomly assigned to 2-year treatments focused on diet (decreasing calories and fat intake), exercise (goal of 1,500 kcal/week of moderate activity), or the combination of diet plus exercise or to a no-treatment control group. Subjects were reassessed at 6 months, 1 year, and 2 years.

RESULTS At 6 months, the groups differed significantly on measures of eating, exercise, and fitness; weight losses in the diet and diet-plus-exercise groups were significantly > in the exercise and control conditions. Weight losses were associated with positive changes in CHD risk factors. After 6 months, there was gradual deterioration of behavioral and physiological changes, so that at 2 years, almost no between-group differences were maintained. Differences between groups in risk of developing diabetes were of borderline significance (P = 0.08). Strongest predictors were impaired glucose tolerance at baseline, which was positively related to risk of developing diabetes, and weight loss from baseline to 2 years, which was negatively related; in all treatment groups, a modest weight loss of 4.5 kg reduced the risk of type 2 diabetes by ∼ 30% compared with no weight loss.

CONCLUSIONS Although initially successful, the interventions studied here were not effective in producing long-term changes in behavior, weight, or physiological parameters. However, weight loss from 0 to 2 years reduced the risk of developing type 2 diabetes. Since modest weight loss significantly reduced risk of type 2 diabetes, further research is needed to determine how best to increase the percentage of subjects achieving at least a modest weight loss.

  • Received July 15, 1996.
  • Accepted November 18, 1997.
  • Copyright © 1998 by the American Diabetes Association

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March 1998, 21(3)
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Lifestyle Intervention in Overweight Individuals With a Family History of Diabetes
Rena R Wing, Elizabeth Venditti, John M Jakicic, Betsy A Polley, Wei Lang
Diabetes Care Mar 1998, 21 (3) 350-359; DOI: 10.2337/diacare.21.3.350

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Lifestyle Intervention in Overweight Individuals With a Family History of Diabetes
Rena R Wing, Elizabeth Venditti, John M Jakicic, Betsy A Polley, Wei Lang
Diabetes Care Mar 1998, 21 (3) 350-359; DOI: 10.2337/diacare.21.3.350
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