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Confounding and effect measure modification in reproductive medicine research
Katharine Fb Correia1, Laura E Dodge2,3,4, Leslie V Farland5
1Department of Mathematics & Statistics, Amherst College, Amherst, MA, USA.
Human Reproduction (Oxford, England)
|May 20, 2020
Summary
Understanding confounding and effect modification is crucial for accurate observational studies in reproductive medicine. Properly addressing these factors ensures valid research findings in gynecologic health and assisted reproductive technology (ART).
Area of Science:
- Reproductive Medicine
- Gynecologic Health
- Observational Study Design
Background:
- Most research in reproductive and gynecologic health, including assisted reproductive technology (ART), relies on observational study designs.
- Observational studies face significant challenges with confounding and effect modification, impacting the validity of research findings.
- Confounding can lead to incorrect conclusions, while effect modification is vital for scientific discovery and inference.
Purpose of the Study:
- To clarify the concepts of confounding and effect modification in the context of reproductive medicine research.
- To emphasize the importance of correctly identifying and addressing confounding and effect modification for sound scientific inference.
- To illustrate the consequences of both failing to adjust for confounders and incorrectly adjusting for non-confounders.
Main Methods:
- This is a commentary, not an empirical study; it uses examples to explain concepts.
- Explanation of confounding and its impact on research validity.
- Explanation of effect modification and its role in discovery and inference.
Main Results:
- Failing to adjust for a confounder leads to invalid research conclusions.
- Adjusting for a factor that is not a confounder can result in invalid or imprecise findings.
- Careful consideration of potential confounders and effect modifiers is essential for robust research.
Conclusions:
- Accurate identification and handling of confounding are critical for valid observational research in reproductive and gynecologic health.
- Understanding effect modification is key for advancing knowledge and making accurate inferences in ART research.
- Sound research in reproductive medicine necessitates meticulous attention to potential confounders and effect modifiers in study design and analysis.
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