title: Impact of patient age on family cancer history.
abstract: OBJECTIVE
  Younger individuals with relatives diagnosed with cancer are at greater risk for developing certain cancer when compared with older individuals with affected relatives. The purpose of this study was to calculate the age-specific proportion of individuals reporting positive family histories for colon, breast, and prostate cancer.
  
  
  METHODS
  Family cancer history information was reviewed on 32,374 adults interviewed for the 2000 National Health Interview Survey. Family histories were categorized as high risk, with a relative diagnosed before 50 years of age or with multiple affected relatives, or moderate risk, with a single relative diagnosed at age 50 years or older.
  
  
  RESULTS
  For individuals with a family history of colorectal cancer, the odds of having a high-risk pedigree decreased by 1% (95% confidence interval 0%-2%) for every year of age increase. For women reporting a family breast cancer history, the odds of reporting a pedigree with high-risk features decreased by 3% (95% confidence interval 2%-4%) for each year of age increase. Age was not associated with reporting a high-risk pedigree for prostate cancer.
  
  
  CONCLUSIONS
  For colorectal and breast cancers, younger individuals reporting a family history of these cancers were more likely to report a pedigree with high-risk features than older individuals.
authors.affiliation: Division of General Internal Medicine and Public Health, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
authors.forename: Harvey J
authors.initials: HJ
authors.lastname: Murff
authors.forename: Neeraja B
authors.initials: NB
authors.lastname: Peterson
authors.forename: Robert
authors.initials: R
authors.lastname: Greevy
authors.forename: Wei
authors.initials: W
authors.lastname: Zheng
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000453:epidemiology / Q000235:genetics; D003110:Colonic Neoplasms / Q000453:epidemiology / Q000235:genetics; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000453:epidemiology* / Q000235:genetics; D010375:Pedigree; D011471:Prostatic Neoplasms / Q000453:epidemiology / Q000235:genetics; D044469:Racial Groups; D012307:Risk Factors