Trends in Mediation Analysis in Nursing Research: Improving Current Practice

Area of Science:

• Nursing Research Methodology
• Statistical Analysis in Healthcare
• Mediation Modeling

Background:

• Mediation models are frequently used in nursing research to understand complex relationships between variables.
• Evaluating the methodological rigor of these analyses is crucial for advancing evidence-based practice.

Purpose of the Study:

• To describe common approaches nursing researchers use to test mediation models.
• To evaluate these approaches in light of current methodological advancements.
• To identify areas for improving the rigor of mediation analysis in nursing studies.

Main Methods:

• A systematic review of 456 studies published in nursing journals from 2004-2015 that tested mediation models.
• Data extraction focused on study design (e.g., correlational, longitudinal) and analysis characteristics (e.g., method, assumptions, sample size).
• Descriptive statistics were used to identify general trends in mediation analysis practices.

Main Results:

• Nursing researchers' application of mediation analysis often demonstrates a lack of awareness regarding underlying assumptions and limitations.
• Commonly used methods may not fully address the complexities of mediation, particularly in longitudinal designs.
• There is a need for enhanced understanding and application of advanced mediation testing techniques.

Conclusions:

• Nursing research utilizing mediation models requires improved methodological rigor.
• Researchers should be more cognizant of analytical assumptions and limitations.
• Adoption of current advanced methods can strengthen the validity and interpretability of mediation findings in nursing.