@article{32f45ab3931545b08b7a0cd4ffb8525c,
title = "Accelerometer-Measured Moderate to Vigorous Physical Activity and Incidence Rates of Falls in Older Women",
abstract = "Objectives: To examine whether moderate to vigorous physical activity (MVPA) measured using accelerometry is associated with incident falls and whether associations differ according to physical function or history of falls. Design: Prospective study with baseline data collection from 2012 to 2014 and 1 year of follow-up. Setting: Women's Health Initiative participants living in the United States. Participants: Ambulatory women aged 63 to 99 (N = 5,545). Measurements: Minutes of MVPA per day measured using an accelerometer, functional status measured using the Short Physical Performance Battery (SPPB), fall risk factors assessed using a questionnaire, fall injuries assessed in a telephone interview, incident falls ascertained from fall calendars. Results: Incident rate ratios (IRRs) revealed greater fall risk in women in the lowest quartile of MVPA compared to those in the highest (IRR = 1.18, 95% confidence interval = 1.01–1.38), adjusted for age, race and ethnicity, and fall risk factors. Fall rates were not significantly associated with MVPA in women with high SPPB scores (9–12) or one or fewer falls in the previous year, but in women with low SPPB scores (≤ 8) or a history of frequent falls, fall rates were higher in women with lower MVPA levels than in those with higher levels (interaction P <.03 and <.001, respectively). Falls in women with MVPA above the median were less likely to involve injuries requiring medical treatment (9.9%) than falls in women with lower MVPA levels (13.0%) (P <.001). Conclusion: These findings indicate that falls are not more common or injurious in older women who engage in higher levels of MVPA. These findings support encouraging women to engage in the amounts and types of MVPA that they prefer. Older women with low physical function or frequent falls with low levels of MVPA are a high-risk group for whom vigilance about falls prevention is warranted.",
keywords = "accelerometer, cohort study, falls, older adults, physical activity",
author = "Buchner, {David M.} and Eileen Rillamas-Sun and Chongzhi Di and LaMonte, {Michael J.} and Marshall, {Stephen W.} and Julie Hunt and Yuzheng Zhang and Rosenberg, {Dori E.} and Lee, {I. Min} and Evenson, {Kelly R.} and Herring, {Amy H.} and Lewis, {Cora E.} and Stefanick, {Marcia L.} and LaCroix, {Andrea Z.}",
note = "Funding Information: This work was supported by the National Institutes of Health; U.S. Department of Health and Human Services Contracts HHSN268201100046C, HHSN268201100001C, HHSN268201100002C, HHSN268201100003C, HHSN268201100004C, and HHSN271201100004C; and National Heart, Lung and Blood Institute (NHLBI) Grant R01HL105065. Conflict of Interest: The authors have no conflicts of interest to declare. Author Contributions: All authors participated in selected portions or all of the planning, design and execution of the study protocol described in this manuscript. AZL drafted this manuscript in close collaboration with all co-authors, each of whom has reviewed, edited, and approved of the final manuscript. The authors acknowledge the following investigators in the WHI Program: Program Office: (NHLBI, Bethesda, MD) Jacques E. Rossouw, Shari Ludlam, Dale Burwen, Joan McGowan, Leslie Ford, and Nancy Geller. Clinical Coordinating Center: Women's Health Initiative Clinical Coordinating Center: (Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA) Garnet L. Anderson, Ross L. Prentice, Andrea Z. LaCroix, and Charles L. Kooperberg. Investigators and Academic Centers: (Brigham and Women's Hospital, Harvard Medical School, Boston, MA) JoAnn E. Mansond; (MedStar Health Research Institute/Howard University, Washington, DC) Barbara V. Howard; (Stanford Prevention Research Center, Stanford, CA) Marcia L. Stefanick; (The Ohio State University, Columbus, OH) Rebecca Jackson; (University of Arizona, Tucson/Phoenix, AZ) Cynthia A. Thomson; (University at Buffalo, Buffalo, NY) Jean Wactawski-Wende; (University of Florida, Gainesville/Jacksonville, FL) Marian C. Limacher; (University of Iowa, Iowa City/Davenport, IA) Robert M. Wallace; (University of Pittsburgh, Pittsburgh, PA) Lewis H. Kuller; (Wake Forest University School of Medicine, Winston-Salem, NC) Sally A. Shumaker. Women's Health Initiative Memory Study: (Wake Forest University School of Medicine, Winston-Salem, NC) Sally A. Shumaker. For a list of all the investigators who have contributed to WHI science, visit https://cleo.whi.org/researchers/SitePages/Write%20a%20Paper.aspx. Sponsor's Role: Decisions concerning study design, data collection and analysis, interpretation of results, preparation of the manuscript, and the decision to submit the manuscript for publication resided with committees comprising WHI investigators that included NHLBI representatives. The contents of the paper are solely the responsibility of the authors. Funding Information: NCT00000611. https://clinicaltrials.gov Financial Disclosure: This work was supported by the National Institutes of Health; U.S. Department of Health and Human Services Contracts HHSN268201100046C, HHSN268201100001C, HHSN268201100002C, HHSN-268201100003C, HHSN268201100004C, and HHSN-271201100004C; and National Heart, Lung and Blood Institute (NHLBI) Grant R01HL105065. Publisher Copyright: {\textcopyright} 2017, Copyright the Authors Journal compilation {\textcopyright} 2017, The American Geriatrics Society",
year = "2017",
month = nov,
doi = "10.1111/jgs.14960",
language = "English (US)",
volume = "65",
pages = "2480--2487",
journal = "Journal of the American Geriatrics Society",
issn = "0002-8614",
publisher = "Wiley-Blackwell",
number = "11",
}