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Abstract

Objective: The aim of this study is to evaluate fall rates across body mass index (BMI) categories by age group, considering physical performance and comorbidities. Method: In the Osteoporotic Fractures in Men (MrOS) study, 5,834 men aged ≥65 reported falls every 4 months over 4.8 (±0.8) years. Adjusted associations between BMI and an incident fall were tested using mixed-effects models. Results: The fall rate (0.66/man-year overall, 95% confidence interval [CI] = [0.65, 0.67]) was lowest in the youngest, normal weight men (0.44/man-year, 95% CI = [0.41, 0.47]) and greatest in the oldest, highest BMI men (1.47 falls/man-year, 95% CI = [1.22, 1.76]). Obesity was associated with a 24% to 92% increased fall risk in men below 80 (ptrend ≤ .0001, p for interaction by age = .03). Only adjustment for dynamic balance test altered the BMI–falls association substantially. Discussion: Obesity was independently associated with higher fall rates in men 65 to 80 years old. Narrow walk time, a measure of gait stability, may mediate the association.

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Article first published online: July 27, 2016
Issue published: October 2017

Keywords

  1. BMI
  2. falls
  3. obesity

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© The Author(s) 2016.
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PubMed: 27469600

Authors

Affiliations

Elizabeth R. Hooker, MS, MPH
Oregon Health & Science University, Portland, USA
Smriti Shrestha, MA
Oregon Health & Science University, Portland, USA
North Carolina Agricultural and Technical State University, Greensboro, USA
Christine G. Lee, MD, MS
Portland Veterans Affairs Medical Center, OR, USA
Peggy M. Cawthon, PhD, MPH
California Pacific Medical Center Research Institute, San Francisco, USA
University of California, San Francisco, USA
Melanie Abrahamson, MPH
Oregon Health & Science University, Portland, USA
Kris Ensrud, MD, MPH
University of Minnesota, Minneapolis, USA
Marcia L. Stefanick, PhD
Stanford University School of Medicine, CA, USA
Thuy-Tien Dam, MD
Columbia University Medical Center, New York, NY, USA
Lynn M. Marshall, ScD
Oregon Health & Science University, Portland, USA
Eric S. Orwoll, MD
Oregon Health & Science University, Portland, USA
Carrie M. Nielson, MPH, PhD
Oregon Health & Science University, Portland, USA
Osteoporotic Fractures in Men (MrOS) Study

Notes

Elizabeth R. Hooker, Bone & Mineral Unit, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., CR113, Portland, OR 97239, USA. Email: [email protected]

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