Pharmacoepidemiology for nephrologists (part 1): concept, applications and considerations for study design

Area of Science:

• Pharmacoepidemiology
• Real-world evidence
• Drug safety and effectiveness research

Background:

• Randomized controlled trials (RCTs) are foundational but have limitations in generalizability and detecting rare/long-term outcomes, especially in kidney disease.
• Observational studies using routine healthcare data can supplement RCTs by evaluating medication use, safety, and effectiveness in real-world settings.
• The increasing availability of large healthcare datasets has led to a rise in studies on medication effects in patients with kidney diseases.

Purpose of the Study:

• To introduce the science of pharmacoepidemiology for critical appraisal of real-world evidence studies.
• To discuss the concept and applications of pharmacoepidemiology in medication research.
• To describe methods for drug-utilization research and evaluate study designs for comparative drug safety and effectiveness.

Main Methods:

• Review of pharmacoepidemiology concepts and applications.
• Description of methods for drug-utilization research.
• Discussion of strengths and limitations of common observational study designs for evaluating drug safety and effectiveness.

Main Results:

• Pharmacoepidemiology provides essential methods to analyze real-world data for drug evaluation.
• Different study designs have unique strengths and caveats when assessing comparative drug safety and effectiveness.
• Real-world evidence complements RCTs, particularly for kidney disease patients and outcomes not captured in trials.

Conclusions:

• Pharmacoepidemiology is crucial for understanding medication use, safety, and effectiveness in real-world populations, including those with kidney diseases.
• Critical appraisal of observational studies is necessary to ensure reliable evidence for clinical decision-making.
• This review serves as an introduction to the field, highlighting its importance in expanding medical evidence beyond traditional clinical trials.