title: Uptake of cystic fibrosis testing in primary care: supply push or demand pull?
abstract: OBJECTIVE
  To determine the acceptability and feasibility of screening for carriers of cystic fibrosis in a primary care setting.
  
  
  METHODS
  Follow up study over 15 months of patients offered carrier testing by mouthwash.
  
  
  METHODS
  A general practice in inner London.
  
  
  METHODS
  5529 patients aged 18-45 invited by various methods and combinations of methods (letter, booklet, personal approach) for testing.
  
  
  METHODS
  Uptake of screening, anxiety, and knowledge of test.
  
  
  RESULTS
  957 (17%) invitees were screened over the 15 months. 28 carriers and no carrier couples were detected. Uptake rates were 12% (59/502 patients) among patients invited by letter and tested by appointment; 9% (47/496) among patients invited by letter, with leaflet, and tested by appointment; 4% (128/2953) among patients invited by letter six weeks before the end of the study and tested by appointment; 17% (81/471) among patients offered passive opportunistic testing; 70% (453/649) among patients offered active opportunistic testing; and 25% (22/88) among patients offered active opportunistic testing by appointment. A short term rise in anxiety among those given a positive test result had dissipated by three months. At three months about one fifth and one third of those given positive and negative results respectively did not understand their results correctly.
  
  
  CONCLUSIONS
  These results suggest that the strongest variable in determining uptake of screening is the active approach by a health professional offering immediate testing. It remains to be resolved whether the high uptake rates achieved by active recruitment indicate a supply push for this new test rather than a demand from the population.
authors.affiliation: Wellcome Psychology and Genetics Research Group, United Medical School of Guy's Hospital, London.
authors.forename: H
authors.initials: H
authors.lastname: Bekker
authors.forename: M
authors.initials: M
authors.lastname: Modell
authors.forename: G
authors.initials: G
authors.lastname: Denniss
authors.forename: A
authors.initials: A
authors.lastname: Silver
authors.forename: C
authors.initials: C
authors.lastname: Mathew
authors.forename: M
authors.initials: M
authors.lastname: Bobrow
authors.forename: T
authors.initials: T
authors.lastname: Marteau
mesh_terms: D000293:Adolescent; D000328:Adult; D001007:Anxiety; D032882:Comprehension; D003550:Cystic Fibrosis / Q000235:genetics*; D005194:Family Practice; D005240:Feasibility Studies; D005260:Female; D006580:Genetic Carrier Screening / Q000379:methods; D005820:Genetic Testing / Q000379:methods / Q000706:statistics & numerical data*; D006801:Humans; D033181:Information Dissemination; D008131:London; D008297:Male; D008875:Middle Aged; D009067:Mouthwashes; D010342:Patient Acceptance of Health Care / Q000706:statistics & numerical data*; D017060:Patient Satisfaction; D011320:Primary Health Care
chemical_list: D009067:Mouthwashes