title: Self-Reported And Objectively Recorded Colorectal Cancer Screening Participation In England.
abstract: OBJECTIVE
  To compare self-reported with objectively recorded participation in Faecal Occult Blood testing (FOBt) colorectal cancer (CRC) screening in a national programme.
  
  
  METHODS
  Survey respondents living in England who were eligible for screening were asked in face-to-face interviews if they had ever been invited to do a CRC screening test, how many times they had been invited, and how many times they had participated. National Health Service (NHS) Bowel Cancer Screening Programme (BCSP) records were consulted for respondents who had consented to a record check. The outcome measures were 'ever uptake' (responded to ≥1 invitation), 'repeat uptake' (responded to ≥2 invitations), and 'consistent uptake' (responded to all invitations).
  
  
  RESULTS
  In the verified group, self-reported ever uptake was highly consistent with recorded ever uptake (87.0% vs. 87.8%). Among those who indicated that they had been invited more than once, self-reported repeat uptake was 89.8% compared with 84.8% recorded repeat uptake. Among those with more than one recorded invitation, self-reported repeat uptake was 72.7% compared with 77.2% recorded repeat uptake, and self-reported consistent uptake was 81.6% compared with 65.6% recorded consistent uptake.
  
  
  CONCLUSIONS
  Our results suggest that people can accurately report whether they have ever taken part in CRC screening. The vast majority of those whose records were verified could also accurately report whether they had taken part in screening at least twice. They were somewhat less accurate in reporting whether they had responded to all screening invitations.
authors.affiliation: Cancer Research UK Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London WC1E 6BT.
authors.forename: Siu Hing
authors.initials: SH
authors.lastname: Lo
authors.affiliation: Cancer Research UK Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London WC1E 6BT.
authors.forename: Jo
authors.initials: J
authors.lastname: Waller
authors.affiliation: Cancer Research UK Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London WC1E 6BT.
authors.forename: Charlotte
authors.initials: C
authors.lastname: Vrinten
authors.affiliation: Cancer Research UK Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London WC1E 6BT.
authors.forename: Jane
authors.initials: J
authors.lastname: Wardle
authors.affiliation: Cancer Research UK Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London WC1E 6BT c.wagner@ucl.ac.uk.
authors.forename: Christian
authors.initials: C
authors.lastname: von Wagner
mesh_terms: D000368:Aged; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D055088:Early Detection of Cancer / Q000706:statistics & numerical data*; D004739:England; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D057566:Self Report; D013222:State Medicine; D011795:Surveys and Questionnaires
keywords: Colorectal cancer screening; objectively recorded uptake; over-reporting; self-reported uptake; under-reporting