Incorporating Medical Interventions into Genetic Counseling
Author Information
Author(s): Katki Hormuzd A
Primary Institution: National Cancer Institute, NIH, DHHS
Hypothesis
Can Mendelian models for predicting genetic mutation carriers be improved by accounting for medical interventions?
Conclusion
Not accounting for medical interventions can lead to misleading carrier probability estimates that may affect clinical recommendations for genetic testing.
Supporting Evidence
- Oophorectomy reduces breast cancer risk by 54% in carriers.
- Ignoring medical interventions can lead to underestimating carrier probabilities.
- The new BRCAPRO model accounts for medical interventions and is available for clinical use.
Takeaway
This study shows that when family members have had medical procedures to reduce cancer risk, it can change how likely someone is to carry a harmful gene. It's important to include this information when predicting genetic risks.
Methodology
The study extends Mendelian models to include medical interventions by estimating their effects on mutation penetrance and carrier probability.
Potential Biases
Potential bias exists if family members choose interventions based on knowledge of their genetic risk that is not available to the consultand.
Limitations
The study relies on existing literature for estimating hazard ratios, which may not fully capture the effects of interventions in all populations.
Statistical Information
P-Value
0.048
Confidence Interval
(0.01, 0.25)
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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