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Risk Adjustment for Lumbar Dysfunction: Comparison of Linear Mixed Models With and Without Inclusion of Between-Clinic Variation as a Random Effect

Sheng-Che Yen, Marie B. Corkery, Kevin K. Chui, Justin Manjourides, Ying-Chih Wang, Linda J. Resnik
DOI: 10.2522/ptj.20140444 Published 1 December 2015
Sheng-Che Yen
S-C. Yen, PT, PhD, Department of Physical Therapy, Movement and Rehabilitation Sciences, Bouvé College of Health Sciences, Northeastern University, 308G Robinson Hall, 360 Huntington Ave, Boston, MA 02115 (USA).
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Marie B. Corkery
M.B. Corkery, PT, DPT, MHS, FAAOMPT, Department of Physical Therapy, Movement and Rehabilitation Sciences, Bouvé College of Health Sciences, Northeastern University.
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Kevin K. Chui
K.K. Chui, PT, DPT, PhD, GCS, OCS, FAAOMPT, Department of Physical Therapy, College of Health Professions, Sacred Heart University, Fairfield, Connecticut.
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Justin Manjourides
J. Manjourides, PhD, Department of Health Sciences, Bouvé College of Health Sciences, Northeastern University.
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Ying-Chih Wang
Y-C. Wang, PhD, OTR/L, Occupational Science and Technology Department, College of Health Sciences, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin.
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Linda J. Resnik
L.J. Resnik, PT, PhD, Providence VA Medical Center and Department of Health Services, Policy and Practice, Brown University, Providence, Rhode Island.
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Appendix.
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Appendix.

Comorbidity Conditions

Tables

Table 1.
Table 1.

Comparisons Between Patients With and Without Missing FS Values at Dischargea

  • ↵a FS=functional status, HMO=health maintenance organization, PPO=preferred provider organization.

Table 2.
Table 2.

Descriptive Statistics for Patient Level (N=147,623)a

  • ↵a FS=functional status, HMO=health maintenance organization, PPO=preferred provider organization.

Table 3.
Table 3.

Descriptive Statistics at the Clinic Level (n=1,470)a

  • ↵a Median, 25th percentile, and 75th percentile were calculated using the weighted average method. FS=functional status, HMO=health maintenance organization, PPO=preferred provider organization.

Table 4.
Table 4.

Estimates for Fixed Effects, Random Effects, Error Residuals, and Model Goodness of Fita

  • ↵a CI=confidence interval, FS=functional status, HMO=health maintenance organization, PPO=preferred provider organization; AIC=Akaike's information criterion, BIC=Schwarz's Bayesian criterion, ref=reference category.

Table 5.
Table 5.

Percentage Change in Model Goodness of Fit, Error Residuals, and Fixed-Effect Coefficientsa

  • ↵a AIC=Akaike's information criterion, BIC=Schwarz's Bayesian criterion, FS=functional status, HMO=health maintenance organization, PPO=preferred provider organization, ref=reference category.

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Vol 95 Issue 12 Table of Contents
Physical Therapy: 95 (12)

Issue highlights

  • Physical Activity and Sedentary Behavior in Children With Cerebral Palsy
  • Whole-Body Vibration in Stroke
  • Implementing Quality Improvement for Higher-Value Low Back Pain Care
  • Role of Health Services Research
  • Risk Adjustment for Lumbar Dysfunction
  • Out-of-Pocket Spending for Ambulatory Services: National Panel Survey
  • Physical Therapy for Medicaid Enrollees
  • Association of Rehabilitation Intensity and Risk of Hospital Readmission
  • CMS G-Code Functional Limitation Severity Modifiers
  • Refinements of Medicare Outpatient Therapy
  • Self-Reported Disability in Older Adults
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Risk Adjustment for Lumbar Dysfunction: Comparison of Linear Mixed Models With and Without Inclusion of Between-Clinic Variation as a Random Effect
Sheng-Che Yen, Marie B. Corkery, Kevin K. Chui, Justin Manjourides, Ying-Chih Wang, Linda J. Resnik
Physical Therapy Dec 2015, 95 (12) 1692-1702; DOI: 10.2522/ptj.20140444

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Risk Adjustment for Lumbar Dysfunction: Comparison of Linear Mixed Models With and Without Inclusion of Between-Clinic Variation as a Random Effect
Sheng-Che Yen, Marie B. Corkery, Kevin K. Chui, Justin Manjourides, Ying-Chih Wang, Linda J. Resnik
Physical Therapy Dec 2015, 95 (12) 1692-1702; DOI: 10.2522/ptj.20140444
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Subjects

  • Musculoskeletal System/Orthopedic
    • Injuries and Conditions: Low Back
  • Outcomes Measurement
  • Special Series and Special Issues
    • Health Services Research Special Series
  • Health Services Research

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