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Initial Results of the L.I.T.E. Study: Living Lean in a Toxic Environment

Initial Results of the L.I.T.E. Study: Living Lean in a Toxic Environment. Rena R Wing, 1 Suzanne Phelan, 1 Hollie Raynor, 1 Wei Lang 2 Dustin Jordan, 1 Marta Roberts 1 1 Brown Medical School/The Miriam Hospital 2 Wakeforest University School of Medicine. NIDDK RO1 DK 066787.

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Initial Results of the L.I.T.E. Study: Living Lean in a Toxic Environment

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  1. Initial Results of the L.I.T.E. Study: Living Lean in a Toxic Environment Rena R Wing,1 Suzanne Phelan,1 Hollie Raynor, 1 Wei Lang2 Dustin Jordan,1 Marta Roberts1 1Brown Medical School/The Miriam Hospital 2Wakeforest University School of Medicine NIDDK RO1 DK 066787

  2. Background • Challenge to maintain normal body weight in the current obesogenic environment. • Two groups of interest: • Normal weight individuals without history of obesity • Long-term weight loss maintainers

  3. Objective and Hypothesis • To compare the behaviors and preferences of Long-term Weight Loss Maintainers (WLM) and Normal Weight controls (NW). • We hypothesized that WLM would have: • Higher exercise levels • Lower fat intake Lower preference for PA Greater preference for high fat foods

  4. Methods • Cross-sectional comparison of two groups • Recruitment through national media • Measures sent via mail

  5. Subject Inclusion Criteria and Characteristics: Weight Loss Maintainers N = 161

  6. Subject Inclusion Criteria and Characteristics: Normal Weight Controls N = 109

  7. Subject Characteristics

  8. Measures • Random 24 hour dietary recalls • Completed using Nutrition Data Systems for Research (NDS-R) Software • Conducted by trained dietary interviewers, blinded to participants’ groups • Tri-trac accelerometer • Duration, frequency, and intensity of physical activity

  9. Measures • Rolls Food Preference Questionnaire • 22 item questionnaire • E.g., Which food tastes better: Chocolate candy vs hard candy • Physical Activity Preference Questionnaire • Enjoyment of various intensities of physical activity • Eating Inventory: Cognitive Restraint subscale • SF-36: General Health, Mental Health, Social Functioning, Vitality

  10. Results: Daily Calorie Intake p = .10

  11. Results: Percentage of Daily Calories from Fat p < 0.0001

  12. Results: Cognitive Restraint p < 0.0001

  13. Time (minutes per day) Spent Doing Moderate Physical Activity p = .03

  14. Results: Time (minutes per day) spent at various intensities of physical activity

  15. Results: Calories expended per day in various levels of physical activity

  16. Results: Food Preferences p < 0.0001 p < .05

  17. Results: Physical Activity Preferences p = .002 p = .03

  18. Results: Quality of Life

  19. Limitations • Self-selected sample • Predominantly female and Caucasian • Self-report measures of weight

  20. Conclusions • Both groups appeared to eat a low calorie, low fat diet and do high levels of physical activity • The weight loss maintainers did more extreme behaviors to maintain their weight loss, despite liking these behaviors less than the normal weight controls. • These greater efforts did not appear to negatively affect quality of life.

  21. Predictors of Long-term Successful Weight Loss Suzanne Phelan, Ph.D. Rena Wing, Ph.D. Amy Gorin, Ph.D. Michael Lowe, Ph.D Brown Medical School & Drexel University

  22. Study Purpose • To better understand the role of dispositional, environmental, and behavioral factors in determining long-term successful weight control • Examine predictors across a variety of different treatment and patient populations.

  23. Study Design • Cross-sectional comparison of successful weight losers and unsuccessful weight losers • Longitudinal examination of predictors of successful weight loss

  24. Participants • “Successful Weight Losers”- Wing Study • > 30 lb weight loss • > 5 year duration of success • Weight stable • Normal weight • “Unsuccessful Weight Losers”- Gorin/Lowe Studies • History of weight loss and regain • Overweight or obese

  25. Outcomes

  26. Study Progress: Recruitment

  27. Study Progress • Assembling and scoring baseline data from Wing/ Gorin sites • Baseline analyses should be done and ready to present in October. • Next steps: Integrate Lowe data (~June, 2007)

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