R. Wallace

Publications938
h-index124
Citations72,734
Highly Influential Citations2,630
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A short physical performance battery assessing lower extremity function: association with self-reported disability and prediction of mortality and nursing home admission.
BACKGROUND A short battery of physical performance tests was used to assess lower extremity function in more than 5,000 persons age 71 years and older in three communities. METHODS Balance, gait,… Expand
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Prevalence of Dementia in the United States: The Aging, Demographics, and Memory Study
Aim: To estimate the prevalence of Alzheimer’s disease (AD) and other dementias in the USA using a nationally representative sample. Methods: The Aging, Demographics, and Memory Study sample was… Expand
  • 1,427
  • 119
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Effects of conjugated equine estrogen in postmenopausal women with hysterectomy: the Women's Health Initiative randomized controlled trial.
CONTEXT Despite decades of use and considerable research, the role of estrogen alone in preventing chronic diseases in postmenopausal women remains uncertain. OBJECTIVE To assess the effects on… Expand
  • 3,962
  • 97
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Lower extremity function and subsequent disability: consistency across studies, predictive models, and value of gait speed alone compared with the short physical performance battery.
BACKGROUND Although it has been demonstrated that physical performance measures predict incident disability in previously nondisabled older persons, the available data have not been fully developed… Expand
  • 2,012
  • 85
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Estrogen plus progestin and the incidence of dementia and mild cognitive impairment in postmenopausal women: the Women's Health Initiative Memory Study: a randomized controlled trial.
CONTEXT Postmenopausal women have a greater risk than men of developing Alzheimer disease, but studies of the effects of estrogen therapy on Alzheimer disease have been inconsistent. On July 8, 2002,… Expand
  • 927
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Calcium plus vitamin D supplementation and the risk of fractures.
BACKGROUND The efficacy of calcium with vitamin D supplementation for preventing hip and other fractures in healthy postmenopausal women remains equivocal. METHODS We recruited 36,282… Expand
  • 1,614
  • 49
  • PDF
Prevalence of Cognitive Impairment without Dementia in the United States
Context How common is mild cognitive impairment in older adults? Contribution This study of 856 individuals from the national Health and Retirement Study found that 22% of adults age 71 or older had… Expand
  • 693
  • 48
Sleep complaints among elderly persons: an epidemiologic study of three communities.
The frequencies of five common sleep complaints--trouble falling asleep, waking up, awaking too early, needing to nap and not feeling rested--were assessed in over 9,000 participants aged 65 years… Expand
  • 1,319
  • 47
Effects of continuing or stopping alendronate after 5 years of treatment: the Fracture Intervention Trial Long-term Extension (FLEX): a randomized trial.
CONTEXT The optimal duration of treatment of women with postmenopausal osteoporosis is uncertain. OBJECTIVE To compare the effects of discontinuing alendronate treatment after 5 years vs continuing… Expand
  • 1,169
  • 46
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Calcium plus vitamin D supplementation and the risk of colorectal cancer.
BACKGROUND Higher intake of calcium and vitamin D has been associated with a reduced risk of colorectal cancer in epidemiologic studies and polyp recurrence in polyp-prevention trials. However,… Expand
  • 912
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