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Related Experiment Videos

Coronary heart disease knowledge test: developing a valid and reliable tool.

M M Smith1, V L Hicks, V H Heyward

  • 1Weber State University in Ogden, Utah.

The Nurse Practitioner
|April 1, 1991
PubMed
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A new 40-question test effectively measures coronary heart disease (CHD) knowledge and risk factors. Patients in cardiac rehabilitation programs (CRP) scored significantly higher, confirming the test

Area of Science:

  • Cardiology
  • Health Education
  • Psychometrics

Background:

  • Assessing patient knowledge of coronary heart disease (CHD) and its risk factors is crucial for effective management.
  • Existing tools may lack validated measures for CHD knowledge, particularly concerning risk factors and rehabilitation participation.
  • Cardiac rehabilitation programs (CRP) aim to improve patient outcomes through education and lifestyle changes.

Purpose of the Study:

  • To develop and validate a reliable written test to assess knowledge of coronary heart disease (CHD) and its risk factors.
  • To evaluate the test's validity and reliability using established psychometric methods.
  • To determine if participation in a cardiac rehabilitation program (CRP) correlates with higher CHD knowledge scores.

Main Methods:

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  • An 80-question multiple-choice test was developed and refined by expert review and pilot testing.
  • Content validity was ensured through expert ratings; item discrimination and internal consistency were assessed using point-biserial correlation and Kuder-Richardson formula 20 (KR-20).
  • The final 40-question test was administered to 93 male CHD patients, categorized into treatment (CRP participants) and control (non-participants) groups.

    • Main Results:

    • The final 40-item test demonstrated good validity, with item difficulty ratings ranging from 0% to 98% (average 63%).
    • Internal consistency reliability was high at 0.84 (KR-20).
    • Construct validation showed significantly higher scores for the treatment group (CRP participants) compared to the control group (t = 3.51, p < 0.01).

    Conclusions:

    • The developed 40-question test is a valid and reliable instrument for assessing patient knowledge of coronary heart disease and its risk factors.
    • The test effectively differentiates between patients with varying levels of engagement in cardiac rehabilitation.
    • This tool can be valuable in evaluating the effectiveness of patient education within cardiac rehabilitation programs.