• 1
    Loeser RF Jr. Aging and the etiopathogenesis and treatment of osteoarthritis. Rheum Dis Clin North Am 2000; 26: 54767.
  • 2
    Hochberg MC. Osteoarthritis: clinical features. In: KlippelJH, editor. Primer on the rheumatic diseases. 12th ed. Atlanta: Arthritis Foundation; 2001. p. 28992.
  • 3
    Fried LP, Bandeen-Roche K, Kasper JD, Guralnik JM. Association of comorbidity with disability in older women: the Women's Health and Aging Study. J Clin Epidemiol 1999; 52: 2737.
  • 4
    Nguyen-Oghalai TU, Ottenbacher KJ, Granger CV, Goodwin JS. Impact of osteoarthritis on the rehabilitation of patients following a stroke. Arthritis Rheum 2005; 53: 3837.
  • 5
    Final Rule Inpatient Rehabilitation Facility Prospective Payment System (IRF-PAI). Washington (DC): Department of Health and Human Services, Centers for Medicare and Medicaid Services; 2000. URL:
  • 6
    Braithwaite RS, Col NF, Wong JB. Estimating hip fracture morbidity, mortality and costs. J Am Geriatr Soc 2003; 51: 36470.
  • 7
    Barangan JD. Factors that influence recovery from hip fracture during hospitalization. Orthop Nurs 1990; 9: 1930.
  • 8
    Guide for the Uniform Data Set for Medical Rehabilitation. Adult FIM Instrument. Version 5.1. Buffalo (NY): Uniform Data System for Medical Rehabilitation; 1997.
  • 9
    Hamilton BB, Granger CV, Sherwin FS, Zielezny M, Tashman JS. A uniform national data system for medical rehabilitation. In: FuhrerM, editor. Rehabilitation outcomes: analysis and measurement. Baltimore (MD): Paul H. Brookes; 1987. p. 13750.
  • 10
    Ottenbacher KJ, Mann WC, Granger CV, Tomita M, Hurren D, Charvat B. Inter-rater agreement and stability of functional assessment in the community-based elderly. Arch Phys Med Rehabil 1994; 75: 1297301.
  • 11
    Smith PM, Illig SB, Fiedler RC, Hamilton BB, Ottenbacher KJ. Intermodal agreement of follow-up telephone functional assessment using the Functional Independence Measure in patients with stroke. Arch Phys Med Rehabil 1996; 77: 4315.
  • 12
    Ottenbacher KJ, Smith PM, Illig SB, Linn RT, Ostir GV, Granger CV. Trends in length of stay, living setting, functional outcome, and mortality following medical rehabilitation. JAMA 2004; 292: 168795.
  • 13
    Dobrez DG, Lo Sasso AT, Heinemann AW. The effect of prospective payment on rehabilitative care. Arch Phys Med Rehabil 2004; 85: 190914.
  • 14
    Giaquinto S, Ferrara I, Muschera R, Pagano G, Nolfe G. The effects of atrial fibrillation on functional recovery in post-stroke patients. Disabil Rehabil 2001; 23: 2048.
  • 15
    Giaquinto S, Palma E, Maiolo I, Piro MT, Roncacci S, Sciarra A, et al. Importance and evaluation of comorbidity in rehabilitation. Disabil Rehabil 2001; 23: 2969.
  • 16
    Lew HL, Lee E, Date ES, Zeiner H. Influence of medical comorbidities and complications on FIM change and length of stay during inpatient rehabilitation. Am J Phys Med Rehabil 2002; 81: 8307.
  • 17
    Giaquinto S. Comorbidity in post-stroke rehabilitation. Eur J Neurol 2003; 10: 2358.
  • 18
    Quan H, Parsons GA, Ghali WA. Validity of information on comorbidity derived from ICD-9-CCM administrative data. Med Care 2002; 40: 67585.
  • 19
    Szklo M, Nieto F. Understanding lack of validity: bias. In: Epidemiology beyond the basics. Gaithersburg: Aspen; 2000. p. 12575.
  • 20
    Jaro MA. Probabilistic linkage of large public health data files. Stat Med 1995; 14: 4918.