Understanding why restrictive trial eligibility criteria are inappropriate

Area of Science:

• Clinical research methodology
• Evidence-based medicine

Background:

• Explanatory clinical trials use restrictive eligibility criteria.
• Pragmatic clinical trials employ more inclusive criteria.

Purpose of the Study:

• To analyze the rationale behind differing eligibility criteria in clinical trials.
• To contrast theoretical and clinical medicine approaches to subject selection.

Main Methods:

• Examined contrasting views on eligibility criteria.
• Reviewed subject selection purposes and generalization in laboratory research, population studies, and clinical trials.

Main Results:

• Laboratory research prioritizes homogenous material for causal signal isolation.
• Epidemiological studies use random sampling for population representativeness.
• Clinical trials should focus on patient benefit, necessitating inclusive criteria in care settings.

Conclusions:

• Restrictive patient selection methods originate from theoretical medicine.
• Clinical trials conducted in care settings should be pragmatic and maximally inclusive.