avi
Uploaded by
16 SLIDES
318 VUES
170LIKES

The Impact of Dietary Protein on Lean Mass in Older Adults: A Critical Review of Findings

DESCRIPTION

This critique examines the association between dietary protein intake and changes in lean mass among older community-dwelling adults, based on the Health, Aging, and Body Composition (Health ABC) study. The research highlights that inadequate protein may accelerate sarcopenia, emphasizing the need for protein-rich diets in aging populations. Key findings indicate that higher protein intake correlates with less loss in lean and appendicular mass. The strengths and weaknesses of the study, along with implications for dietetics practice and future research directions, are discussed.

1 / 16

Télécharger la présentation

The Impact of Dietary Protein on Lean Mass in Older Adults: A Critical Review of Findings

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

Playing audio...

  1. Research Critique Hailey Koch September 18, 2013

  2. Dietary protein intake is associated with lean mass change In older community-dwelling adults: the Health, Aging and Body Composition (Health ABC) Study Denise K Houston, Barbara J Nicklas, Jingzhong Ding, Tamara B Harris, Frances A Tylvasky, Anne B Newman, Jung Sun Lee, Nadine R Sahyoun, Marjolein Visser, and Stephen B Kritchevsky; 2008

  3. Briefly… Outline Objectives • Background • Results • Strengths/Weaknesses • Future Research • Applications to Dietetics • Explore a relevant topic that addresses the increasing elderly population • Discuss validity of findings regarding dietary protein & lean mass • Apply research to dietetics practice

  4. Research Need • Inadequate dietary protein intake may accelerate the process of sarcopenia in aging adults • Few studies of this nature have investigated associations in older adults

  5. Background • Objective • Determine association between dietary protein and changes in lean mass (LM) and appendicular lean mass (aLM) • Secondary Objectives • Research Question • “If older adults consume defined amounts of dietary protein and these amounts correlate with their body composition (specifically LM and aLM), then there must be an association.”

  6. Background • Design • Prospective cohort • Study population (n = 2066) • Age 70-79 y • Medicare-eligible residents in Pittsburg, PA and Memphis, TN metropolitan areas

  7. Exposure • Dietary Protein Intake • Assessment tool: Food Frequency Questionnaire (FFQ) • Individual exposure data measured @ year 2 and 3-year follow-up

  8. Outcome • Lean Mass (LM) and Appendicular Lean Mass (aLM) • Assessment tool: Dual-Energy X-ray Absorptiometry • Measured @ year 2 and 3-year follow-up (year 5)

  9. Results • 28.8% lost >3% of body weight • 21.7% gained >3% of body weight • 49.5% remained weight stable • Participants in highest protein quintile lost significantly less LM and aLM compared to participants in lowest protein quintile • Protein intake was associated with changes in aLM in weight gainers and weight losers • Total protein and animal protein significantly associated with changes in LM

  10. Change in Lean Mass by Quintile of Dietary Protein Intake

  11. Change in Appendicular Lean Mass by Quintile of Dietary Protein Intake

  12. Appendicular Lean Mass by Quintile of Dietary Protein Intake According to Weight Change Status (P-value < 0.05)

  13. Strengths & Weaknesses • Sample size (n = 2066) • Appropriate inclusion and exclusion criteria • Confounders • Statistical significance • DXA used to measure body composition • Length of study • Sample representative? • FFQ not a primary dietary intake tool • LM changes due to lifestyle? • Protein categories not defined • Reason for weight loss unknown in “weight loser” participants • Observational study cannot make a cause-effect conclusion or association

  14. Future Research • Dietary protein intake as a modifiable risk factor in older adults • Weight loss strategies in obese older adults • Risks for weight losers • Consideration of protein standard for older adults

  15. Applications to Dietetics • Assessment • Evaluation of Intake • Education • Intervention

  16. Questions????

More Related