Physical Function in Older Men with Hyperkyphosis

Wendy B. Katzman, Stephanie L. Harrison, Howard A. Fink, Lynn M. Marshall, Eric Orwoll, Elizabeth Barrett-Connor, Peggy M. Cawthon, Deborah M. Kado

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Background. Age-related hyperkyphosis has been associated with poor physical function and is a well-established predictor of adverse health outcomes in older women, but its impact on health in older men is less well understood. Methods. We conducted a cross-sectional study to evaluate the association of hyperkyphosis and physical function in 2,363 men, aged 71-98 (M = 79) from the Osteoporotic Fractures in Men Study. Kyphosis was measured using the Rancho Bernardo Study block method. Measurements of grip strength and lower extremity function, including gait speed over 6 m, narrow walk (measure of dynamic balance), repeated chair stands ability and time, and lower extremity power (Nottingham Power Rig) were included separately as primary outcomes. We investigated associations of kyphosis and each outcome in age-adjusted and multivariable linear or logistic regression models, controlling for age, clinic, education, race, bone mineral density, height, weight, diabetes, and physical activity. Results. In multivariate linear regression, we observed a dose-related response of worse scores on each lower extremity physical function test as number of blocks increased, p for trend ≤.001. Using a cutoff of ≥4 blocks, 20% (N = 469) of men were characterized with hyperkyphosis. In multivariate logistic regression, men with hyperkyphosis had increased odds (range 1.5-1.8) of being in the worst quartile of performing lower extremity physical function tasks (p <. 001 for each outcome). Kyphosis was not associated with grip strength in any multivariate analysis. Conclusions. Hyperkyphosis is associated with impaired lower extremity physical function in older men. Further studies are needed to determine the direction of causality.

Original languageEnglish (US)
Pages (from-to)635-640
Number of pages6
JournalJournals of Gerontology - Series A Biological Sciences and Medical Sciences
Volume70
Issue number5
DOIs
StatePublished - May 1 2015

Bibliographical note

Funding Information:
The Osteoporotic Fractures in Men (MrOS) Study is supported by National Institutes of Health funding. The following institutes provide support: the National Institute on Aging (NIA), the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), the National Center for Advancing Translational Sciences (NCATS), the NIH Roadmap for Medical Research, and the Office of Research in Women’s Health under the following grant numbers: U01 AG027810, U01 AG042124, U01 AG042139, U01 AG042140, U01 AG042143, U01 AG042145, U01 AG042168, U01 AR066160, UL1 TR000128, AR06828, RO1 AG041921, and P50 AR063043.

Keywords

  • Hyperkyphosis
  • Kyphosis
  • Normative aging
  • Physical function
  • Physical performance

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