title: Compliance after 17 years of breast cancer screening.
abstract: OBJECTIVE
  To investigate changes in attendance over the course of a population based breast screening programme.
  
  
  METHODS
  Longitudinal; analysis of registered data over nine screening rounds.
  
  
  METHODS
  Subjects belong to the screening population of the Nijmegen experimental breast screening programme (1975-1990).
  
  
  METHODS
  A cohort of 6898 women who were enrolled in 1975 at the age of 50-69 years and who were invited to nine subsequent screening rounds, irrespective of their attendance at previous rounds.
  
  
  RESULTS
  Attendance of women aged 50-53 years at entry was high at the initial screening (88%), decreased in the course of the programme, but remained well over 60% until round 8; 39% completed nine rounds and 24% completed seven to eight rounds. Attendance of women who were older at entry was somewhat lower at the initial screening (87%-82%) and declined more strongly. Regular compliance was also lower. Specific compliance patterns are found that can be relevant for further research.
  
  
  CONCLUSIONS
  A substantial proportion of eligible women can be committed to mammography every two years, possibly even after reaching the age of 70, if the age at entry is around 50 and the screening programme is well established in the community. Starting a screening programme in older women seems ineffective.
authors.affiliation: Northern Centre for Health Care Research, University of Groningen, The Netherlands.
authors.forename: W
authors.initials: W
authors.lastname: Scaf-Klomp
authors.forename: F L
authors.initials: FL
authors.lastname: van Sonderen
authors.forename: R
authors.initials: R
authors.lastname: Stewart
authors.forename: J A
authors.initials: JA
authors.lastname: van Dijck
authors.forename: W J
authors.initials: WJ
authors.lastname: van den Heuvel
mesh_terms: D000367:Age Factors; D000368:Aged; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000517:prevention & control*; D015331:Cohort Studies; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008327:Mammography; D017533:Marital Status; D008403:Mass Screening; D008875:Middle Aged; D009426:Netherlands; D010349:Patient Compliance; D013997:Time Factors