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Related Experiment Videos

Process utility for imaging in cerebrovascular disease.

J Shannon Swan1, François Sainfort, William F Lawrence

  • 1Section of Health Services Research, Indiana University Department of Radiology, Education and Research Institute, 714 N Senate Ave, Suite 100, Indianapolis, IN 46202, USA.

Academic Radiology
|March 20, 2003
PubMed
Summary

Patients preferred MR angiography over conventional angiography, valuing it as 5 quality-adjusted life days higher. This new "waiting trade-off" method quantifies test morbidity for economic analysis.

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Area of Science:

  • Medical Economics
  • Health Services Research
  • Diagnostic Imaging

Background:

  • Quantifying diagnostic test morbidity is crucial for cost-effectiveness analysis but remains controversial.
  • Patient-centered outcomes, including pain and invasiveness, require measuring
  • process utility" alongside expected test value.", "Cerebrovascular disease imaging evaluation highlights the importance of patient-perceived morbidity differences."], "Purpose_of_the_Study": ["To introduce and validate a novel "waiting trade-off" (WTO) method for quantifying patient preferences and morbidity associated with diagnostic tests.", "To compare patient preferences for magnetic resonance (MR) angiography versus conventional x-ray angiography in cerebrovascular disease evaluation.", "To establish a quality-adjustment term for economic analyses based on patient-reported morbidity."], "Main_Methods": ["A "waiting trade-off" (WTO) method was employed with 89 patients experienced in both MR angiography and conventional angiography.", "Patients
  • willingness to wait
  • for an ideal test result and immediate treatment was compared against undergoing conventional or MR angiography with immediate treatment.

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  • Convergent validity of the WTO was assessed using a rating scale.

    • Purpose of the Study:

    • A significant patient preference (P = .0001) favored MR angiography over conventional angiography.
    • The preference difference translated to an estimated 5 quality-adjusted life days.
    • Negative experiences with conventional angiography correlated with a longer willingness to wait for an ideal test.

    Main Methods:

    • The WTO method effectively estimates the relative morbidity of invasive angiographic procedures.
    • The method provides a valuable quality-adjustment term for economic evaluations of diagnostic tests.
    • This approach facilitates a more comprehensive assessment of medical process impacts on patient care.

    Main Results:

    • A significant patient preference (P = .0001) favored MR angiography over conventional angiography.
    • The preference difference translated to an estimated 5 quality-adjusted life days.
    • Negative experiences with conventional angiography correlated with a longer willingness to wait for an ideal test.

    Conclusions:

    • The WTO method provides a reasonable estimate of relative morbidity for invasive procedures.
    • It offers a quality-adjustment term essential for economic analyses in healthcare.
    • This approach enhances the evaluation of diagnostic processes and their impact on patient care.