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A note on methodological fallacies in the "X% fallacy" literature
International Journal of Aging & Human Development
|January 1, 1983
Summary
The "4-5% fallacy" overestimates nursing home institutionalization risk. New analysis using national data reveals the true annual risk is between 6 and 9 percent, not 25 percent.
Area of Science:
- Gerontology
- Public Health
- Biostatistics
Background:
- Previous literature suggested a 25% risk of nursing home institutionalization, a figure known as the "4-5% fallacy."
- This estimate was based on potentially flawed implicit assumptions regarding resident data.
Purpose of the Study:
- To re-evaluate the actual risk of nursing home institutionalization.
- To challenge the "4-5% fallacy" by applying a more rigorous statistical approach.
Main Methods:
- Utilized the most recent national statistics on nursing home residency and discharge data.
- Developed a novel measurement technique to estimate the range of nursing home residents.
- Calculated the annualized risk of institutionalization based on updated residency and discharge figures.
Main Results:
- The study identified a maximum and minimum number of nursing home residents for 1976.
- The recalculated annualized risk of institutionalization was found to be between 6 and 9 percent.
- This range contradicts the previously cited 25% risk, indicating a significant overestimation in prior studies.
Conclusions:
- The "4-5% fallacy" is demonstrably inaccurate due to invalid underlying assumptions.
- The true annual risk of nursing home institutionalization is substantially lower, estimated between 6-9%.
- This revised risk estimate provides a more accurate basis for public health policy and resource allocation concerning long-term care.
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