Journal
IMMUNOGENETICS
Volume 57, Issue 8, Pages 549-558Publisher
SPRINGER
DOI: 10.1007/s00251-005-0025-x
Keywords
genetics; genetic association; statistics; epidemiology; standards; linkage disequilibrium; quantitative trait loci
Categories
Funding
- NCI NIH HHS [CA105417-01] Funding Source: Medline
- NHGRI NIH HHS [HG001656-06] Funding Source: Medline
- NIMH NIH HHS [MH62009-05] Funding Source: Medline
- NATIONAL CANCER INSTITUTE [U01CA105417] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF MENTAL HEALTH [P20MH062009] Funding Source: NIH RePORTER
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Many statistical associations between a disease and alleles of specific genes have proven to be irreproducible. In part, this irreproducibility can be attributed to a lack of replication before publication and the fact that, until recently, the relationship between statistical significance and various measures of reproducibility was not widely understood. This review proposes a classification system, the Better Associations for Disease and GEnes (BADGE) system, for describing genetic associations. The BADGE classes, first class through fifth class, are based on the P value of the association. A first-class association, with P < 2x10(-7), is expected to be reproducible even in the absence of other evidence supporting the association. A fifth-class association corresponds to conventional statistical significance (P < 5x10(-2)), which provides almost no assurance of reproducibility. Three intervening classes, described as second-, third-, and fourth-class associations, are defined by P values separated by factors of 20 or 25 from these extremes.
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