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The Penn shoulder score: reliability and validity.

Brian G Leggin1, Lori A Michener, Michael A Shaffer

  • 1University of Pennsylvania Medical Center, Presbyterian, Philadelphia, PA 19104, USA. brian.leggin@uphs.upenn.edu

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Summary
This summary is machine-generated.

The Penn Shoulder Score (PSS) demonstrates strong reliability and validity for assessing shoulder conditions. This validated tool accurately measures patient outcomes in pain, satisfaction, and function.

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Area of Science:

  • Orthopedics
  • Physical Therapy
  • Rehabilitation Medicine

Background:

  • Shoulder outcome measures are crucial for evaluating patient-reported pain, satisfaction, and function.
  • The Penn Shoulder Score (PSS) is a 100-point, 3-subscale (pain, satisfaction, function) questionnaire used in shoulder research.
  • Establishing the psychometric properties of the PSS, including reliability, validity, and responsiveness, is essential.

Purpose of the Study:

  • To examine the psychometric properties of the Penn Shoulder Score (PSS).
  • To assess the reliability and validity of the PSS for shoulder disorders.

Main Methods:

  • Cross-sectional survey design involving psychometric evaluation.
  • Test-retest reliability assessed using the PSS in 40 patients with shoulder disorders.
  • Convergent construct validity evaluated by comparing PSS with Constant Shoulder Score (CSS) and American Shoulder and Elbow Surgeons Shoulder Score (ASES).
  • Internal consistency and responsiveness assessed in a separate cohort of 109 patients.

Main Results:

  • High test-retest reliability (ICC2,1 = 0.94) and internal consistency (Cronbach alpha = 0.93).
  • Strong correlations with CSS (0.85) and ASES (0.87), indicating good convergent validity.
  • Significant responsiveness with an effect size of 1.01 and standardized response mean of 1.27.
  • Minimal clinically important difference (MCID) for improvement was 11.4 points.

Conclusions:

  • The Penn Shoulder Score (PSS) is a reliable and valid instrument.
  • The PSS effectively measures outcomes for patients with diverse shoulder disorders.
  • The PSS demonstrates good psychometric properties for clinical use.