Journal of Clinical Epidemiology
Volume 64, Issue 3 , Pages 320-330 , March 2011

Weighted index explained more variance in physical function than an additively scored functional comorbidity scale

  • Linda Resnik

      Affiliations

    • Providence VA Medical Center, Department of Community Health, Box G-S121(6), Brown University, Providence, RI 02908, USA
    • Corresponding Author InformationCorresponding author. Department of Community Health, Providence VA Medical Center, Box G-S121(6), Brown University, Providence, RI 02908, USA. Tel.: 401-863-9214; fax: 401-863-3489.
    • ,
  • Pedro Gozalo

      Affiliations

    • Department of Community Health, Brown University, Providence, RI 02908, USA
    • ,
  • Dennis L. Hart

      Affiliations

    • Focus On Therapeutic Outcomes, Inc., Knoxville, TN 37939, USA

,Accepted 13 February 2010.

References 

  1. Ciolek D, Hwang W. Outpatient Therapy Alternative Payment Study 2 (OTAPS 2). Center for Medicare and Medicaid, Task Order Number HHSM-500-2007-00322G; Feb 2008;Available at https://www.cms.gov/TherapyServices/downloads/2_CY2006OutpatientTherapyUtilizationReport_PDF_Final.pdf. Accessed June 15, 2010.
  2. Dynacorp . Outpatient therapy utilization. Available at http://www.cms.hhs.gov/providers/therapy/dynacorprpt.asp2002;Accessed August 9, 2005
  3. Chan L. The state-of-the-science: challenges in designing postacute care payment policy. Arch Phys Med Rehabil. 2007;88:1522–1525
  4. Hart D, Connolly J. Pay-or-performance for physical therapy and occupational therapy: medicare Part B services. Grant #18-P-93066/9-01 Health & Human Services/Centers for Medicare & Medicaid Services; 2006;Available at http://www.cms.gov/TherapyServices/downloads/P4PFinalReport06-01-06.pdf. Accessed July 15, 2010
  5. Porter ME, Teisberg EO. Redefining health care: creating value-based competition on results. Boston, MA: Harvard Business School Press; 2006;xvii, p. 506
  6. Haley SM, Coster WJ, Andres PL, Ludlow LH, Ni P, Bon TL, et al. Activity outcome measurement for postacute care. Med Care. 2004;42(1 Suppl):I49–I61
  7. Guccione AA, Mielenz TJ, Devellis RF, Goldstein MS, Freburger JK, Pietrobon R, et al. Development and testing of a self-report instrument to measure actions: outpatient physical therapy improvement in movement assessment log (OPTIMAL). Phys Ther. 2005;85:515–530
  8. Resnik L, Feng Z, Hart DL. State regulation and the delivery of physical therapy services. Health Serv Res. 2006;41(4 Pt 1):1296–1316
  9. Hart DL, Wang YC, Stratford PW, Mioduski JE. Computerized adaptive test for patients with foot or ankle impairments produced valid and responsive measures of function. Qual Life Res. 2008;17:1081–1091
  10. Hart DL, Wang YC, Stratford PW, Mioduski JE. A computerized adaptive test for patients with hip impairments produced valid and responsive measures of function. Arch Phys Med Rehabil. 2008;89:2129–2139
  11. Hart DL, Wang YC, Stratford PW, Mioduski JE. Computerized adaptive test for patients with knee impairments produced valid and responsive measures of function. J Clin Epidemiol. 2008;61:1113–1124
  12. Iezzoni L. Dimensions of risk, in risk adjustment for measuring healthcare outcomes. In:  Iezzoni L editors. Chicago, IL: Health Administration Press; 1997;p. 43–168
  13. Hofer TP, Hayward RA, Greenfield S, Wagner EH, Kaplan SH, Manning WG. The unreliability of individual physician “report cards” for assessing the costs and quality of care of a chronic disease. JAMA. 1999;281:2098–2105
  14. Di Fabio RP, Boissonnault W. Physical therapy and health-related outcomes for patients with common orthopaedic diagnoses. J Orthop Sports Phys Ther. 1998;27:219–230
  15. Jette DU, Jette AM. Physical therapy and health outcomes in patients with knee impairments. Phys Ther. 1996;76:1178–1187
  16. Jette DU, Jette AM. Physical therapy and health outcomes in patients with spinal impairments. Phys Ther. 1996;76:930–941discussion 942–945
  17. In:  Iezzoni L editors. Risk adjustment for measuring health care outcomes. Ann Arbor, MI: Health Administration Press; 1994;
  18. Greenfield S, Sullivan L, Silliman RA, Dukes K, Kaplan SH. Principles and practice of case mix adjustment: applications to end-stage renal disease. Am J Kidney Dis. 1994;24:298–307
  19. Greenfield S, Kaplan SH, Kahn R, Ninomiya J, Griffith JL. Profiling care provided by different groups of physicians: effects of patient case-mix (bias) and physician-level clustering on quality assessment results. Ann Intern Med. 2002;136:111–121
  20. Charlson ME, Pompei P, Ales KL, MacKenzie CR. A new method of classifying prognostic comorbidity in longitudinal studies: development and validation. J Chronic Dis. 1987;40:373–383
  21. Kaplan MH, Feinstein AR. The importance of classifying initial co-morbidity in evaluatin the outcome of diabetes mellitus. J Chronic Dis. 1974;27:387–404
  22. Groll DL, To T, Bombardier C, Wright JG. The development of a comorbidity index with physical function as the outcome. J Clin Epidemiol. 2005;58:595–602
  23. Hopman WM, Towheed T, Anastassiades T, Tenenhouse A, Poliquin S, Berger C, et al. Canadian normative data for the SF-36 health survey. Canadian Multicentre Osteoporosis Study Research Group. CMAJ. 2000;163:265–271
  24. Fanuele JC, Birkmeyer NJ, Abdu WA, Tosteson TD, Weinstein JN. The impact of spinal problems on the health status of patients: have we underestimated the effect?. Spine. 2000;25:1509–1514
  25. Hart DL, Werneke MW, Wang YC, Stratford PW, Mioduski JE. Computerized adaptive test for patients with lumbar spine impairments produced valid and sensitive measures of function. Spine. In press.
  26. Resnik L, Hart DL. Using clinical outcomes to identify expert physical therapists. Phys Ther. 2003;83:990–1002
  27. Resnik L, Liu D, Mor V, Hart DL. Predictors of physical therapy clinic performance in the treatment of patients with low back pain syndromes. Phys Ther. 2008;88:989–1004discussion 1004–1011
  28. Resnik L, Liu D, Hart DL, Mor V. Benchmarking physical therapy clinic performance: statistical methods to enhance internal validity when using observational data. Phys Ther. 2008;88:1078–1087
  29. Swinkels IC, Hart DL, Deutscher D, van den Bosch WJ, Dekker J, de Bakker DH, et al. Comparing patient characteristics and treatment processes in patients receiving physical therapy in the United States, Israel and the Netherlands: cross sectional analyses of data from three clinical databases. BMC Health Serv Res. 2008;8:163
  30. Swinkels IC, van den Ende CH, de Bakker D, Van der Wees PJ, Hart DL, Deutscher D, et al. Clinical databases in physical therapy. Physiother Theory Pract. 2007;23:153–167
  31. Zimmerman DR. Improving nursing home quality of care through outcomes data: the MDS quality indicators. Int J Geriatr Psychiatry. 2003;18:250–257
  32. Resnik L, Dobrykowski E. Outcomes measurement for patients with low back pain. Orthop Nurs. 2005;24:14–24
  33. Cohen BA, Grigonis AM, Topper ME, Morrison MH. The development of an outcomes management system for acute medical rehabilitation. Am J Med Qual. 1997;12:28–32
  34. Groll DL, Heyland DK, Caeser M, Wright JG. Assessment of long-term physical function in acute respiratory distress syndrome (ARDS) patients: comparison of the Charlson Comorbidity Index and the Functional Comorbidity Index. Am J Phys Med Rehabil. 2006;85:574–581
  35. Deyo RA, Battie M, Beurskens AJ, Bombardier C, Croft P, Koes B, et al. Outcome measures for low back pain research. A proposal for standardized use. Spine. 1998;23:2003–2013
  36. Hart DL. Assessment of unidimensionality of physical functioning in patients receiving therapy in acute, orthopedic outpatient centers. J Outcome Meas. 2000;4:413–430
  37. Hart DL, Wright BD. Development of an index of physical functional health status in rehabilitation. Arch Phys Med Rehabil. 2002;83:655–665
  38. Linacre JM. Estimating measures with known polytomous item difficulties. Rasch Meas Trans. 1998;12:638
  39. Hart DL, Mioduski JE, Stratford PW. Simulated computerized adaptive tests for measuring functional status were efficient with good discriminant validity in patients with hip, knee, or foot/ankle impairments. J Clin Epidemiol. 2005;58:629–638
  40. Hart DL, Cook KF, Mioduski JE, Teal CR, Crane PK. Simulated computerized adaptive test for patients with shoulder impairments was efficient and produced valid measures of function. J Clin Epidemiol. 2006;59:290–298
  41. Hart DL, Mioduski JE, Werneke MW, Stratford PW. Simulated computerized adaptive test for patients with lumbar spine impairments was efficient and produced valid measures of function. J Clin Epidemiol. 2006;59:947–956
  42. Ware J, Kosinski M, Keller SD. A 12-item short-form health survey: construction of scales and preliminary tests of reliability and validity. Med Care. 1996;34:220–233
  43. Ware JE, Snow KK, Kosisnki M, Gandek B. SF-36 health survey: manual and interpretation guide. Boston, MA: The Health Institute New England Medical Center; 1993;
  44. Andrich D. A rating formulation for ordered response categories. Psychometrika. 1978;43:561–573
  45. Wang YC, Hart DL, Stratford PW, Mioduski JE. Clinical interpretation of computerized adaptive test-generated outcome measures in patients with knee impairments. Arch Phys Med Rehabil. 2009;90:1340–1348
  46. Deutscher D, Hart DL, Dickstein R, Horn SD, Gutvirtz M. Implementing an integrated electronic outcomes and electronic health record process to create a foundation for clinical practice improvement. Phys Ther. 2008;88:270–285
  47. In:  Wainer H,  Mahwah NJ editor. Computerized adaptive testing. A primer. Lawrence Erlbaum Associates; 2000;
  48. Robins JM, Hernan MA, Brumback B. Marginal structural models and causal inference in epidemiology. Epidemiology. 2000;11:550–560
  49. Lubotsky D, Wittenberg M. Interpretation of regression with multiple proxies. Rev Econ Stat. 2006;88:549–562
  50. StataCorp . Stata statistical software: release 9. College Station, TX: StataCorp LP; 2005;

 Funding for this research was provided by the National Institute of Child Health and Human Development (NICHD) R03 HD053780-01A1.

PII: S0895-4356(10)00179-4

doi: 10.1016/j.jclinepi.2010.02.019

Journal of Clinical Epidemiology
Volume 64, Issue 3 , Pages 320-330 , March 2011

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