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How is a clinical trial defined?

As any investigation in human subjects aimed at verifying the efficacy of marketing strategies

As any investigation in human subjects intended to discover or verify clinical effects of an investigational product

A clinical trial is defined as an investigation in human subjects that is intended to discover or verify the clinical effects of an investigational product. This definition is critical because it emphasizes the nature of clinical trials as focused studies that assess the safety, effectiveness, and potential benefits of new treatments or interventions. Clinical trials are designed to rigorously test hypotheses and collect data that can inform regulatory decision-making, clinical guidelines, and subsequent research. The focus on human subjects is essential, as it distinguishes clinical trials from other types of studies that may not involve direct human experimentation, like surveys or systematic reviews. In a clinical trial, the investigational product can include drugs, medical devices, vaccines, or even treatment modalities, all aimed at contributing to medical knowledge and improving patient care. This definition aligns with the regulatory frameworks and ethical considerations that govern clinical research, highlighting the importance of scientifically robust methodologies that ensure patient safety and the integrity of the data collected.

As a survey of treatment satisfaction among patients

As a systematic review of existing clinical data

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