Long-term effects of a lifestyle intervention on weight and cardiovascular risk factors in individuals with type 2 diabetes mellitus: Four-year results of the look AHEAD trial

  • Rena R. Wing
  • , Judy L. Bahnson
  • , George A. Bray
  • , Jeanne M. Clark
  • , Mace Coday
  • , Caitlin Egan
  • , Mark A. Espeland
  • , John P. Foreyt
  • , Edward W. Gregg
  • , Valerie Goldman
  • , Steven M. Haffner
  • , Helen Hazuda
  • , James O. Hill
  • , Edward S. Horton
  • , Van S. Hubbard
  • , John Jakicic
  • , Robert W. Jeffery
  • , Karen C. Johnson
  • , Steven Kahn
  • , Tina Killean
  • Abbas E. Kitabchi, Cora E. Lewis, Cathy Manus, Barbara J. Maschak-Carey, Sara Michaels, Maria Montez, Brenda Montgomery, David M. Nathan, Jennifer Patricio, Anne Peters, Xavier Pi-Sunyer, Henry Pownall, David Reboussin, W. Jack Rejeski, Richard Rubin, Monika Safford, Tricia Skarphol, Brent Van Dorsten, Thomas A. Wadden, Lynne Wagenknecht, Jacqueline Wesche-Thobaben, Delia S. West, Donald Williamson, Susan Z. Yanovski

Research output: Contribution to journalArticlepeer-review

1159 Scopus citations

Abstract

Background: Lifestyle interventions produce shortterm improvements in glycemia and cardiovascular disease (CVD) risk factors in individuals with type 2 diabetes mellitus, but no long-term data are available. We examined the effects of lifestyle intervention on changes in weight, fitness, and CVD risk factors during a 4-year study. Methods: The Look AHEAD (Action for Health in Diabetes) trial is a multicenter randomized clinical trial comparing the effects of an intensive lifestyle intervention (ILI) and diabetes support and education (DSE; the control group) on the incidence of major CVD events in 5145 overweight or obese individuals (59.5% female; mean age, 58.7 years) with type 2 diabetes mellitus. More than 93% of participants provided outcomes data at each annual assessment. Results: Averaged across 4 years, ILI participants had a greater percentage of weight loss than DSE participants (-6.15% vs -0.88%; P < .001) and greater improvements in treadmill fitness (12.74% vs 1.96%; P < .001), hemoglobin A1c level (-0.36% vs -0.09%; P < .001), systolic (-5.33 vs -2.97 mm Hg; P < .001) and diastolic (-2.92 vs -2.48 mm Hg; P=.01) blood pressure, and levels of high-density lipoprotein cholesterol (3.67 vs 1.97 mg/dL; P < .001) and triglycerides (-25.56 vs -19.75 mg/dL; P < .001). Reductions in low-density lipoprotein cholesterol levels were greater in DSE than ILI participants (-11.27 vs -12.84 mg/dL; P=.009) owing to greater use of medications to lower lipid levels in the DSE group. At 4 years, ILI participants maintained greater improvements than DSE participants in weight, fitness, hemoglobin A1c levels, systolic blood pressure, and highdensity lipoprotein cholesterol levels. Conclusions: Intensive lifestyle intervention can produce sustained weight loss and improvements in fitness, glycemic control, and CVD risk factors in individuals with type 2 diabetes. Whether these differences in risk factors translate to reduction in CVD events will ultimately be addressed by the Look AHEAD trial. Trial Registration: clinicaltrials.gov Identifier: NCT00017953

Original languageEnglish (US)
Pages (from-to)1566-1575
Number of pages10
JournalArchives of Internal Medicine
Volume170
Issue number17
DOIs
StatePublished - Sep 27 2010

ASJC Scopus subject areas

  • Internal Medicine

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