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Comparison of SF-36 and RAND-36 in Cardiovascular Diseases: A Reliability Study

Estrella García-Sánchez1, Mirian Santamaría-Peláez2, Eva Benito Figuerola1

  • 1Cardiac Rehabilitation Unit, Rehabilitation Service, University Hospital of Burgos, 09006 Burgos, Spain.

Journal of Clinical Medicine
|October 26, 2024
PubMed

Insights

Both the Short Form 36 Health Survey (SF-36) and the RAND 36-Item Health Survey (RAND-36) demonstrate reliable health-related quality of life measurements in cardiovascular disease patients. These findings support their use in clinical practice for monitoring patient outcomes.

Area of Science:

  • Cardiology
  • Health Outcomes Research
  • Psychometrics

Background:

  • Cardiovascular diseases (CVD) are a major global health burden, necessitating effective tools to assess patient impact.
  • Health-related quality of life (HRQoL) is vital for evaluating CVD effects and guiding treatment.
  • The reliability of common HRQoL instruments like SF-36 and RAND-36 may differ across patient populations.

Purpose of the Study:

  • To compare the reliability of the SF-36 and RAND-36 questionnaires.
  • To determine which instrument provides a more consistent and useful HRQoL measurement in cardiac patients.
  • To address the suitability of these tools for a specific patient group with cardiac pathology.

Main Methods:

  • A cross-sectional observational study involving 413 patients with cardiovascular pathology.
  • Inclusion criteria focused on patients referred to a Cardiac Rehabilitation Unit.
  • Reliability was assessed using internal consistency (Cronbach's alpha), item-total correlation, and split-half analysis.

Main Results:

  • Both SF-36 and RAND-36 exhibited adequate and comparable reliability in the studied cardiovascular patient cohort.
  • Cronbach's alpha values exceeded 0.80 for most dimensions, indicating strong internal consistency.
  • Inter-item and inter-dimension correlations were significant, with minor exceptions in the 'Physical Functioning' dimension for both scales.

Conclusions:

  • The SF-36 and RAND-36 are both highly reliable instruments for assessing HRQoL in patients with cardiovascular disease.
  • These findings have practical implications for selecting appropriate HRQoL monitoring tools in clinical settings.
  • The study supports the use of these questionnaires for evaluating the effectiveness of therapeutic interventions in cardiac patients.

Keywords:
RAND-36SF-36cardiovascular diseasehealth-related quality of lifereliability

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