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Risk models in genetic epidemiology.
1Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, Connecticut 06520-8034, USA.
Statistical Methods in Medical Research
|April 20, 2001
Summary
Estimating genetic susceptibility risk is crucial for identifying individuals at risk for inherited diseases. This overview covers various risk models and their application in genetic epidemiology, emphasizing breast cancer risk assessment.
Area of Science:
- Genetic Epidemiology
- Medical Statistics
Background:
- Advances in genetic disease identification necessitate reliable genetic susceptibility risk estimates.
- Accurate risk assessment informs clinical decisions, genetic counseling, and clinical trial eligibility.
Purpose of the Study:
- To provide an overview of risk definitions and frequently used risk estimation methods in genetic epidemiology.
- To discuss how different methods quantify uncertainty in risk estimates.
- To highlight applications in breast cancer risk modeling.
Main Methods:
- Overview of various risk models including logistic regression, Cox proportional hazards regression, log-incidence, and Bayesian modeling.
- Discussion of data utilized in risk models (molecular, epidemiologic, clinical, family history).
- Consideration of gene-environment interactions when sample size permits.
Main Results:
- Family history remains a primary variable, especially for unidentified susceptibility alleles.
- Risk models vary in data requirements and complexity.
- Methods differ in their ability to provide measures of error or uncertainty.
Conclusions:
- Accurate genetic risk estimation is vital for personalized medicine and clinical decision-making.
- A range of statistical models are available for genetic risk assessment.
- Breast cancer serves as a key example for extensively defined risk assessment strategies.