title: Increase in screening for colorectal cancer in older Americans: results from a national survey.
abstract: OBJECTIVE
  To compare the proportions of the U.S. population aged 65 and older who underwent tests for colorectal cancer (CRC) in 2000 and 2005 to examine the effect of the change in Medicare reimbursement for screening colonoscopy that occurred in 2001.
  
  
  METHODS
  National population-based survey.
  
  
  METHODS
  United States.
  
  
  METHODS
  A total of 6,035 respondents to the 2000 National Health Interview Survey (NHIS) and 5,490 respondents to the 2005 NHIS aged 65 and older.
  
  
  METHODS
  A questionnaire was used to assess self-reports of testing (colonoscopy, sigmoidoscopy, or home fecal occult blood test (FOBT)) for CRC. Estimates for the U.S. population were extrapolated from the survey results. To account for the complex sampling design, SUDAAN was used to calculate population sizes and proportions.
  
  
  RESULTS
  In U.S. adults aged 65 and older, the proportion reporting up-to-date CRC testing increased from 39.5% in 2000 to 47.1% in 2005. By 2005, endoscopy had become more common than home FOBT for CRC screening in older adults. In 2000 and in 2005, a higher proportion of men than women were screened across all age groups and for all screening modalities. The proportion screened declined with older age.
  
  
  CONCLUSIONS
  Substantial increases in CRC testing, particularly colonoscopy, followed changes in Medicare reimbursement for screening colonoscopy in adults aged 65 and older. Although nearly half of older adults were up to date with CRC tests, differences remained in the use of screening according to age and sex within this age group.
authors.affiliation: Constella Group, LLC, Atlanta, Georgia, USA.
authors.forename: Xiao
authors.initials: X
authors.lastname: Chen
authors.forename: Mary C
authors.initials: MC
authors.lastname: White
authors.forename: Lucy A
authors.initials: LA
authors.lastname: Peipins
authors.forename: Laura C
authors.initials: LC
authors.lastname: Seeff
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003113:Colonoscopy / Q000706:statistics & numerical data*; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology / Q000517:prevention & control; D003430:Cross-Sectional Studies; D005260:Female; D006306:Health Surveys; D006801:Humans; D015994:Incidence; D019458:Insurance Coverage; D008297:Male; D008403:Mass Screening / Q000706:statistics & numerical data*; D006278:Medicare / Q000706:statistics & numerical data; D008875:Middle Aged; D009780:Occult Blood; D012812:Sigmoidoscopy / Q000706:statistics & numerical data*; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D014481:United States; D014600:Utilization Review