Excess Cancer Risk Terminology U.S.cancer rate:1 in 4 or or 0.25 Acceptable excess cancer rate for each chemical exposure 0.25 + ·How ab0ut0.25+0.000001=.250001 0.000001 1.0 x 10-6,often referred to as 10-6 cancer risk, this means that assuming daily exposure over a 70 year lifetime that an individual would have a 1 in 1 million risk of cancer above normal probability. 08(am Population risk,individual risk will vary with genetic predisposition to OSU cancer,lifestyle,and other factors. 0regonstae Excess Cancer Risk Terminology • U.S. cancer rate: 1 in 4 or ¼ or 0.25 • Acceptable excess cancer rate for each chemical exposure = 0.25 + ? • How about 0.25 + 0.000001=.250001 * • 0.000001 = 1.0 x 10-6, often referred to as 10-6 cancer risk, this means that assuming daily exposure over a 70 year lifetime that an individual would have a 1 in 1 million risk of cancer above normal probability. *Population risk, individual risk will vary with genetic predisposition to cancer, lifestyle, and other factors