Linkage Analysis of Systolic Blood Pressure in Families
Author Information
Author(s): Byng Martyn C, Fisher Sheila A, Lewis Cathryn M, Whittaker John C
Primary Institution: Guy's, King's and St. Thomas' School of Medicine
Hypothesis
How do different phenotypes and corrections for variables affect the results of variance components linkage analysis for systolic blood pressure?
Conclusion
The study found suggestive evidence for a gene on chromosome 8 that contributes to variations in systolic blood pressure.
Supporting Evidence
- Suggestive evidence for linkage to chromosome 8 was found across most phenotypes analyzed.
- The maximum LOD score of 2.5 was obtained for the age 40 systolic blood pressure phenotype.
- 30% to 40% of the phenotypic variance is explained by a quantitative trait locus in the chromosome 8 region.
Takeaway
Researchers looked at family data to find out how genes might affect blood pressure, and they think they found a gene that plays a big role.
Methodology
The study analyzed nine phenotypes of systolic blood pressure using variance components linkage analysis on data from nuclear families.
Potential Biases
Assumed that all missing data occurred at random, which may not be the case.
Limitations
The study did not apply a correction for multiple testing across phenotypes, which may affect the results.
Participant Demographics
Participants were from the Framingham Heart Study, with no specific demographic details provided.
Digital Object Identifier (DOI)
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