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Rule-based ranking schemes for antiretroviral trials
1Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis 55414, USA.
Statistics in Medicine
|May 30, 1997
Summary
This study proposes rule-based ranking schemes to improve outcome measurement in HIV treatment trials. A novel ranking method, prioritizing disease severity and occurrence, closely matched expert opinions, offering a more robust endpoint for clinical research.
Area of Science:
- Clinical Trials Methodology
- HIV/AIDS Research
- Biostatistics
Background:
- Endpoints in antiretroviral (anti-HIV) clinical trials are controversial, particularly the use of laboratory measurements versus clinical outcomes.
- The standard clinical endpoint, defined as the first occurrence or recurrence of an AIDS-defining condition or death, lacks critical scrutiny and has weaknesses.
Purpose of the Study:
- To propose and evaluate rule-based ranking schemes as an alternative outcome measure for antiretroviral trials.
- To compare the effectiveness of these schemes against expert subjective rankings.
Main Methods:
- Six rule-based ranking schemes were developed to rank patients' post-randomization histories.
- These schemes were applied to 60 participants from CPCRA 002 and compared with rankings from five expert clinicians.
- The study analyzed agreement between rule-based schemes and expert rankings.
Main Results:
- Expert rankings showed high inter-rater agreement.
- The six evaluated rule-based schemes demonstrated varying degrees of agreement with expert rankings.
- The most effective scheme ranked patients based on the severity and timing of their most serious AIDS-defining disease, followed by the total number of such diseases.
Conclusions:
- Rule-based ranking schemes offer a viable and potentially more robust alternative to traditional endpoints in HIV clinical trials.
- A specific ranking scheme, prioritizing disease severity, timing, and cumulative burden, aligns well with expert clinical judgment.