For example, does the 3% increase in risk referred to above pertain to absolute or relative risk? A 3% increase in absolute risk of pancreatic cancer, observed in BRCA2 mutation carriers, from 1 to 4%, is quite significant, while a 3% increase in relative risk for pancreatic cancer due to a common SNP (relative risk 1.03 compared to 1.0) indeed seems negligible.
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