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No short-cut in assessing trial quality: a case study
1Department of Epidemiology and Biostatistics, Muhimbili University of Health and Allied Sciences, P O Box 65015, Dar es Salaam, Tanzania. kfhirji@aol.com
Trials
|January 9, 2009
Summary
Checklists for assessing trial quality can be misleading. A comprehensive review revealed serious flaws in a highly-rated study, highlighting the need for in-depth scrutiny beyond simple checklists.
Area of Science:
- Medical research methodology
- Evidence-based medicine
- Systematic reviews
Background:
- Assessing the quality of included trials is crucial for systematic reviews.
- Numerous checklist-type instruments exist for trial quality assessment.
- This paper examines limitations of checklist approaches using a specific case study.
Purpose of the Study:
- To illustrate the limitations of checklist-based trial quality assessment.
- To highlight potential flaws missed by standard quality evaluation methods.
- To advocate for augmented, in-depth trial reviews.
Main Methods:
- Utilized a case study of an antibiotic treatment trial for acute otitis media (Burke et al., 1991).
- Performed a comprehensive evaluation of the trial's design, conduct, analysis, and reporting.
- Compared findings with previous quality assessments from nine systematic reviews.
Main Results:
- Previous checklist evaluations rated the Burke et al. (1991) trial as high quality.
- Extensive meta-analyses relied heavily on data from this trial.
- The comprehensive evaluation uncovered significant design, conduct, analysis, and reporting issues missed by checklists.
Conclusions:
- Checklist-based assessments can incorrectly rate flawed trials as high quality.
- In-depth review, protocol scrutiny, and data examination are essential.
- The identified issues necessitate an independent audit before trial inclusion in systematic reviews.
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