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Criteria for evaluation of therapeutic response to antifungal drugs
Abstract:
A therapeutic trial of antifungal therapy in humans requires not only well-defined objectives and a sufficient number of patients, but also standardized criteria for the diagnosis and evaluation of response, including the efficacy, failure, and toxicity of any new agent or treatment modality. Generally, the retention of a patient in a study should require, as a minimum, confirmation of the etiologic diagnosis by culture of the organism from the infected site. Two different systems for evaluation of therapy are proposed. The first is a set of definitions of response to therapy; these are adaptable for use in any type of prospective clinical trial and emphasize cure as the best possible outcome. The second system of evaluation employs scored criteria and thereby enables quantitative comparison of the status of a patient before therapy with his or her status at intervals during therapy, at the end of therapy, and at intervals after therapy. This system provides an objective means of measuring improvement in a given patient; thus it is most useful in those diseases in which significant improvement rather than cure is a more realistic goal of therapy, e.g., coccidioidomycosis.
Insights
Standardized criteria are essential for antifungal therapy trials in humans. Two evaluation systems are proposed: one defining response and emphasizing cure, the other using scored criteria for quantitative comparison.
Area of Science:
- Clinical Mycology
- Therapeutic Trial Design
Background:
- Antifungal therapy trials necessitate standardized diagnostic and response evaluation criteria.
- Patient retention in studies requires etiologic diagnosis confirmation via culture.
Observation:
- Two distinct therapeutic evaluation systems are proposed.
- The first system defines response, prioritizing cure.
- The second system uses scored criteria for quantitative patient assessment.
Findings:
- The proposed systems offer standardized methods for evaluating antifungal treatment efficacy, failure, and toxicity.
- The scored criteria system allows objective measurement of patient improvement over time.
- This quantitative approach is particularly valuable for chronic conditions where significant improvement, not just cure, is the therapeutic goal.
Implications:
- Implementation of these standardized criteria can enhance the rigor and comparability of antifungal clinical trials.
- Objective measurement of treatment response facilitates better patient management and therapeutic decision-making.
- These evaluation frameworks support the development of more effective antifungal agents and treatment strategies.