Recovery of Activities of Daily Living in Older Adults After Hospitalization for Acute Medical Illness
Cynthia M. Boyd MD, MPH
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorC. Seth Landefeld MD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorSteven R. Counsell MD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorRobert M. Palmer MD, MPH
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorRichard H. Fortinsky PhD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorDenise Kresevic RN, PhD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorChristopher Burant MA, PhD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorKenneth E. Covinsky MD, MPH
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorCynthia M. Boyd MD, MPH
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorC. Seth Landefeld MD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorSteven R. Counsell MD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorRobert M. Palmer MD, MPH
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorRichard H. Fortinsky PhD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorDenise Kresevic RN, PhD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorChristopher Burant MA, PhD
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorKenneth E. Covinsky MD, MPH
From the * Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Department of Medicine, School of Medicine, and † Department of Health Policy and Management, Center on Aging and Health, and the Roger C. Lipitz Center for Integrated Health Care, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland ‡ Division of Geriatrics, Department of Medicine, University of California at San Francisco, San Francisco, California § Interdisciplinary Research Program to Improve Care for Older Veterans and the Quality Scholars Program, San Francisco Veterans Affairs Medical Center, San Francisco, California ∥ Indiana University Center for Aging Research, Indianapolis, Indiana # Division of Geriatric Medicine, University of Pittsburgh School Medical Center, Pittsburgh, Pennsylvania ** Center on Aging and Division of Geriatrics, University of Connecticut Health Center, Farmington, Connecticut †† School of Nursing, Department of Sociology and Bioethics, University Hospitals Case Medical Center, Louis Stokes Cleveland Veterans Affairs Medical Center, GRE and ‡‡ Department of Sociology and Bioethics, Case Western Reserve University, Cleveland, Ohio.
Search for more papers by this authorPreliminary results of this work were presented at the Gerontological Society of America Annual Meeting in November 2004.
Abstract
OBJECTIVES: To compare functional outcomes in the year after discharge for older adults discharged from the hospital after an acute medical illness with a new or additional disability in their basic self-care activities of daily living (ADL) (compared with preadmission baseline 2 weeks before admission) with those of older adults discharged with baseline ADL function and identify predictors of failure to recover to baseline function 1 year after discharge.
DESIGN: Observational.
SETTING: Tertiary care hospital, community teaching hospital.
PARTICIPANTS: Older (aged ≥70) patients nonelectively admitted to general medical services (1993–1998).
MEASUREMENTS: Number of ADL disabilities at preadmission baseline and 1, 3, 6, and 12 months after discharge. Outcomes were death, sustained decline in ADL function, and recovery to baseline ADL function at each time point.
RESULTS: By 12 months after discharge, of those discharged with new or additional ADL disability, 41.3% died, 28.6% were alive but had not recovered to baseline function, and 30.1% were at baseline function. Of those discharged at baseline function, 17.8% died, 15.2% were alive but with worse than baseline function, and 67% were at their baseline function (P<.001). Of those discharged with new or additional ADL disability, the presence or absence of recovery by 1 month was associated with long-term outcomes. Age, cardiovascular disease, dementia, cancer, low albumin, and greater number of dependencies in instrumental ADLs independently predicted failure to recover.
CONCLUSION: For older adults discharged with new or additional disability in ADL after hospitalization for medical illness, prognosis for functional recovery is poor. Rehabilitation interventions of longer duration and timing than current reimbursement allows, caregiver support, and palliative care should be evaluated.
REFERENCES
- 1 Ferrucci L, Guralnik JM, Simonsick E et al. Progressive versus catastrophic disability: A longitudinal view of the disablement process. J Gerontol A Biol Sci Med Sci 1996; 51A: M123–M130.
- 2 Gill TM, Williams CS, Tinetti ME. The combined effects of baseline vulnerability and acute hospital events on the development of functional dependence among community-living older persons. J Gerontol A Biol Sci Med Sci 1999; 54A: M377–M383.
- 3 Ferrucci L, Guralnik JM, Pahor M et al. Hospital diagnoses, Medicare charges, and nursing home admissions in the year when older persons become severely disabled. JAMA 1997; 277: 728–734.
- 4 Sager MA, Rudberg MA, Jalaluddin M et al. Hospital Admission Risk Profile (HARP): Identifying older patients at risk for functional decline following acute medical illness and hospitalization. J Am Geriatr Soc 1996; 44: 251–257.
- 5 Boyd CM, Xue QL, Guralnik JM et al. Hospitalization and development of dependence in activities of daily living in a cohort of disabled older women: The Women's Health and Aging Study I. J Gerontol A Biol Sci Med Sci 2005; 60A: 888–893.
- 6 Boyd CM, Xue QL, Simpson CF et al. Frailty, hospitalization, and progression of disability in a cohort of disabled older women. Am J Med 2005; 118: 1225–1231.
- 7 Gill TM, Allore HG, Holford TR et al. Hospitalization, restricted activity, and the development of disability among older persons. JAMA 2004; 292: 2115–2124.
- 8 Covinsky KE, Palmer RM, Fortinsky RH et al. Loss of independence in activities of daily living in older adults hospitalized with medical illnesses: Increased vulnerability with age. J Am Geriatr Soc 2003; 51: 451–458.
- 9 Sager MA, Franke T, Inouye SK et al. Functional outcomes of acute medical illness and hospitalization in older persons. Arch Intern Med 1996; 156: 645–652.
- 10 Hardy SE, Gill TM. Recovery from disability among community-dwelling older persons. JAMA 2004; 291: 1596–1602.
- 11 Gill TM, Robison JT, Tinetti ME. Predictors of recovery in activities of daily living among disabled older persons living in the community. J Gen Intern Med 1997; 12: 757–762.
- 12 Magaziner J, Simonsick EM, Kashner TM et al. Predictors of functional recovery one year following hospital discharge for hip fracture: A prospective study. J Gerontol 1990; 45: M101–M107.
- 13 Rudberg MA, Sager MA, Zhang J. Risk factors for nursing home use after hospitalization for medical illness. J Gerontol A Biol Sci Med Sci 1996; 51A: M189–M194.
- 14 Mahoney JE, Eisner J, Havighurst T et al. Problems of older adults living alone after hospitalization. J Gen Intern Med 2000; 15: 611–619.
- 15 Hardy SE, Gill TM. Factors associated with recovery of independence among newly disabled older persons. Arch Intern Med 2005; 165: 106–112.
- 16 Walter LC, Brand RJ, Counsell SR et al. Development and validation of a prognostic index for 1-year mortality in older adults after hospitalization. JAMA 2001; 285: 2987–2994.
- 17 Inouye SK, Peduzzi PN, Robison JT et al. Importance of functional measures in predicting mortality among older hospitalized patients. JAMA 1998; 279: 1187–1193.
- 18 Johnson MF, Kramer AM, Lin MK et al. Outcomes of older persons receiving rehabilitation for medical and surgical conditions compared with hip fracture and stroke. J Am Geriatr Soc 2000; 48: 1389–1397.
- 19 McCall N, Korb J, Petersons A et al. Reforming Medicare payment: Early effects of the 1997 Balanced Budget Act on postacute care. Milbank Q 2003; 81: 277–303, 172–273.
- 20 Murray PK, Love TE, Dawson NV et al. Rehabilitation services after the implementation of the nursing home prospective payment system: Differences related to patient and nursing home characteristics. Med Care 2005; 43: 1109–1115.
- 21 Shatto A. Comparing Medicare beneficiaries, by type of post-acute care received: 1999. Health Care Financ Rev 2002; 24: 137–142.
- 22 Jette DU, Warren RL, Wirtalla C. The relation between therapy intensity and outcomes of rehabilitation in skilled nursing facilities. Arch Phys Med Rehabil 2005; 86: 373–379.
- 23 Counsell SR, Holder CM, Liebenauer LL et al. Effects of a multicomponent intervention on functional outcomes and process of care in hospitalized older patients: A randomized controlled trial of Acute Care for Elders (ACE) in a community hospital. J Am Geriatr Soc 2000; 48: 1572–1581.
- 24 Covinsky KE, Eng C, Lui LY et al. The last 2 years of life: Functional trajectories of frail older people. J Am Geriatr Soc 2003; 51: 492–498.
- 25 Pfeiffer E. A short portable mental status questionnaire for the assessment of organic brain deficit in elderly patients. J Am Geriatr Soc 1975; 23: 433–441.
- 26 Covinsky KE, Palmer RM, Counsell SR et al. Functional status before hospitalization in acutely ill older adults: Validity and clinical importance of retrospective reports. J Am Geriatr Soc 2000; 48: 164–169.
- 27 Knaus WA, Draper EA, Wagner DP et al. APACHE II: A severity of disease classification system. Crit Care Med 1985; 13: 818–829.
- 28 Zhang J, Yu KF. What's the relative risk? A method of correcting the odds ratio in cohort studies of common outcomes. JAMA 1998; 280: 1690–1691.
- 29 Kozak LJ, DeFrances CJ, Hall MJ. National Hospital Discharge Survey: 2004 annual summary with detailed diagnosis and procedure data. Vital Health Stat 2006; 162: 1–209.
- 30 Magaziner J, Fredman L, Hawkes W et al. Changes in functional status attributable to hip fracture: A comparison of hip fracture patients to community-dwelling aged. Am J Epidemiol 2003; 157: 1023–1031.
- 31 Tilling K, Sterne JA, Rudd AG et al. A new method for predicting recovery after stroke. Stroke 2001; 32: 2867–2873.
- 32 Hardy SE, Dubin JA, Holford TR et al. Transitions between states of disability and independence among older persons. Am J Epidemiol 2005; 161: 575–584.
- 33 Ottenbacher KJ, Smith PM, Illig SB et al. Trends in length of stay, living setting, functional outcome, and mortality following medical rehabilitation. JAMA 2004; 292: 1687–1695.
- 34 Kane RL, Chen Q, Finch M et al. Functional outcomes of posthospital care for stroke and hip fracture patients under medicare. J Am Geriatr Soc 1998; 46: 1525–1533.
- 35 Yip JY, Wilber KH, Myrtle RC. The impact of the 1997 Balanced Budget Amendment's prospective payment system on patient case mix and rehabilitation utilization in skilled nursing. Gerontologist 2002; 42: 653–660.
- 36 Wodchis WP, Fries BE, Pollack H. Payer incentives and physical rehabilitation therapy for nonelderly institutional long-term care residents: Evidence from Michigan and Ontario. Arch Phys Med Rehabil 2004; 85: 210–217.
- 37 Murtaugh CM, McCall N, Moore S et al. Trends in Medicare home health care use: 1997–2001. Health Aff (Millwood) 2003; 22: 146–156.
- 38 Gage B. Impact of the BBA on post-acute utilization. Health Care Financ Rev 1999; 20: 103–126.
- 39 Buechner JS, Donnelly EF. Utilization of inpatient rehabilitation services. Med Health R I 2001; 84: 412–413.
- 40 Kane RL, Lin WC, Blewett LA. Geographic variation in the use of post-acute care. Health Serv Res 2002; 37: 667–682.
- 41 Chen CC, Heinemann AW, Granger CV et al. Functional gains and therapy intensity during subacute rehabilitation: A study of 20 facilities. Arch Phys Med Rehabil 2002; 83: 1514–1523.
- 42 Penrod JD, Boockvar KS, Litke A et al. Physical therapy and mobility 2 and 6 months after hip fracture. J Am Geriatr Soc 2004; 52: 1114–1120.
- 43 Arling G, Williams AR, Kopp D. Therapy use and discharge outcomes for elderly nursing home residents. Gerontologist 2000; 40: 587–595.
- 44 Intrator O, Berg K. Benefits of home health care after inpatient rehabilitation for hip fracture: Health service use by Medicare beneficiaries, 1987–1992. Arch Phys Med Rehabil 1998; 79: 1195–1199.
- 45 Hadley J, Rabin D, Epstein A et al. Posthospitalization home health care use and changes in functional status in a Medicare population. Med Care 2000; 38: 494–507.
- 46 Tinetti ME, Baker D, Gallo WT et al. Evaluation of restorative care vs usual care for older adults receiving an acute episode of home care. JAMA 2002; 287: 2098–2105.
- 47 Gill TM, Baker DI, Gottschalk M et al. A prehabilitation program for physically frail community-living older persons. Arch Phys Med Rehabil 2003; 84: 394–404.
- 48 Guralnik JM, Ferrucci L. Underestimation of disability occurrence in epidemiological studies of older people: Is research on disability still alive? J Am Geriatr Soc 2002; 50: 1599–1601.
- 49 Ostir GV, Goodwin JS, Markides KS et al. Differential effects of premorbid physical and emotional health on recovery from acute events. J Am Geriatr Soc 2002; 50: 713–718.