Aladdin H Shadyab1,2, Charles B Eaton3,4, Wenjun Li3,4, Andrea Z LaCroix3,4. 1. From the Division of Epidemiology, Department of Family Medicine and Public Health, University of California San Diego School of Medicine, La Jolla, California; Center for Primary Care and Prevention, Memorial Hospital of Rhode Island and Department of Family Medicine, Warren Alpert Medical School, Brown University, Providence, Rhode Island; Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA. aladdinhs@yahoo.com. 2. A.H. Shadyab, PhD, Postdoctoral Fellow, Division of Epidemiology, Department of Family Medicine and Public Health, University of California San Diego School of Medicine; C.B. Eaton, MD, MS, Professor, Center for Primary Care and Prevention, Memorial Hospital of Rhode Island and Department of Family Medicine, Warren Alpert Medical School, Brown University; W. Li, PhD, Associate Professor, Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School; A.Z. LaCroix, PhD, Professor, Division of Epidemiology, Department of Family Medicine and Public Health, University of California San Diego School of Medicine. aladdinhs@yahoo.com. 3. From the Division of Epidemiology, Department of Family Medicine and Public Health, University of California San Diego School of Medicine, La Jolla, California; Center for Primary Care and Prevention, Memorial Hospital of Rhode Island and Department of Family Medicine, Warren Alpert Medical School, Brown University, Providence, Rhode Island; Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA. 4. A.H. Shadyab, PhD, Postdoctoral Fellow, Division of Epidemiology, Department of Family Medicine and Public Health, University of California San Diego School of Medicine; C.B. Eaton, MD, MS, Professor, Center for Primary Care and Prevention, Memorial Hospital of Rhode Island and Department of Family Medicine, Warren Alpert Medical School, Brown University; W. Li, PhD, Associate Professor, Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School; A.Z. LaCroix, PhD, Professor, Division of Epidemiology, Department of Family Medicine and Public Health, University of California San Diego School of Medicine.
Abstract
OBJECTIVE: To examine the association between leisure-time physical activity (PA) and survival to age 85 with mobility limitation or death before age 85 after total knee (TKR) or total hip replacement (THR) for osteoarthritis (OA). METHODS: This was a prospective study among participants from the Women's Health Initiative (WHI), recruited 1993-1998 (baseline age 65-79 yrs) and followed through 2012. Medicare claims data were linked to WHI data to determine TKR (n = 1986) and THR (n = 1034). Self-reported PA was collected before total joint replacement (TJR). RESULTS: Women who were physically inactive before THR had the highest risk of mobility limitation at age 85 (OR 2.36, 95% CI 1.30-4.26) compared with women who had the highest amount of PA [> 17.42 metabolic equivalent of task (MET)-hrs/week]. Women who reported no moderate to vigorous PA (MVPA) before THR had the strongest risk of mobility limitation (OR 2.00, 95% CI 1.24-3.22) compared with women with the highest level of MPVA (≥ 15 MET-hrs/week). Women who were physically inactive before TKR had the highest risk of mobility limitation (OR 1.68, 95% CI 1.15-2.45) compared with women who had the highest PA level. Women who reported no MVPA before TKR had the strongest risk of mobility limitation (OR 1.60, 95% CI 1.16-2.19) compared with women with the highest level of MPVA. There were significant dose-response associations of lower PA levels with increased risk of late-life mobility limitation and death. CONCLUSION: Women with lower PA levels before TJR were more likely to experience mobility limitation in late life following TJR for hip or knee OA.
OBJECTIVE: To examine the association between leisure-time physical activity (PA) and survival to age 85 with mobility limitation or death before age 85 after total knee (TKR) or total hip replacement (THR) for osteoarthritis (OA). METHODS: This was a prospective study among participants from the Women's Health Initiative (WHI), recruited 1993-1998 (baseline age 65-79 yrs) and followed through 2012. Medicare claims data were linked to WHI data to determine TKR (n = 1986) and THR (n = 1034). Self-reported PA was collected before total joint replacement (TJR). RESULTS:Women who were physically inactive before THR had the highest risk of mobility limitation at age 85 (OR 2.36, 95% CI 1.30-4.26) compared with women who had the highest amount of PA [> 17.42 metabolic equivalent of task (MET)-hrs/week]. Women who reported no moderate to vigorous PA (MVPA) before THR had the strongest risk of mobility limitation (OR 2.00, 95% CI 1.24-3.22) compared with women with the highest level of MPVA (≥ 15 MET-hrs/week). Women who were physically inactive before TKR had the highest risk of mobility limitation (OR 1.68, 95% CI 1.15-2.45) compared with women who had the highest PA level. Women who reported no MVPA before TKR had the strongest risk of mobility limitation (OR 1.60, 95% CI 1.16-2.19) compared with women with the highest level of MPVA. There were significant dose-response associations of lower PA levels with increased risk of late-life mobility limitation and death. CONCLUSION:Women with lower PA levels before TJR were more likely to experience mobility limitation in late life following TJR for hip or knee OA.
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