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Test-Negative Designs: Differences and Commonalities with Other Case-Control Studies with "Other Patient" Controls
Jan P Vandenbroucke1,2,3, Neil Pearce4
1From the Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.
Epidemiology (Cambridge, Mass.)
|August 21, 2019
Summary
Test-negative studies, a type of case-control design, effectively evaluate disease risk and vaccine efficacy by comparing positive cases with negative controls from the same healthcare setting. This design offers practical advantages and can reduce bias in epidemiological research.
Area of Science:
- Epidemiology
- Biostatistics
- Public Health Research
Background:
- Test-negative designs are frequently employed in vaccine efficacy studies.
- They are often considered distinct from traditional case-control studies due to control selection methods.
Purpose of the Study:
- To re-evaluate the test-negative design within the broader framework of case-control studies.
- To elucidate the advantages and disadvantages of the test-negative design in diverse scenarios.
Main Methods:
- Conceptual analysis comparing test-negative designs to case-control studies with "other patient" controls.
- Exploration of commonalities and differences between the two designs.
Main Results:
- Test-negative designs are a specific instance of case-control studies using "other patient" controls from healthcare facilities.
- The design offers benefits like comparable participation and data quality between cases and controls.
- Under specific conditions, valid population odds ratios can be estimated.
Conclusions:
- Test-negative designs are a valid and often practical epidemiological study option.
- While not eliminating all biases, they can reduce bias in certain situations.
- Directed acyclic graphs offer limited insight into the design's efficacy.