title: [Structure and process quality of quality-assured mamma diagnostics in Schleswig-Holstein].
abstract: OBJECTIVE
  To demonstrate the structure and process quality of quality-assured mamma diagnostics (QuaMaDi) by means of quality indicators as defined in the European Guidelines for Quality Assurance in Breast Cancer Screening and Diagnosis and in the National Guideline on Early Detection of Cancer in Germany. Furthermore, spatial differences and changes in the chronological sequence were analyzed.
  
  
  METHODS
  We used administrative data as documented in the time period 2006 - 2009 in QuaMaDi in Schleswig-Holstein (SH), Germany, and analyzed quality indicators as defined in the abovementioned guidelines (absolute and relative frequencies, 95 % confidence intervals).
  
  
  RESULTS
  Each year approximately 6 % of all women age 20 or older living in SH are examined using QuaMaDi. Only minor differences regarding age and clinical data were seen between the patients in the four regions of SH. Reference values for the quality indicators are largely reached (i. e., proportion of women with breast density ACR 3 or 4 plus additional ultrasound = 96.2 %; proportion with repeated mammography = 0.2 %). Spatial differences are only minor. In the chronological sequence, quality indicators improve, if they did not reach the reference values in the beginning, or indicate a high and constant quality.
  
  
  CONCLUSIONS
  With regard to those quality indicators that were computable, reference values as defined in the guidelines were reached in 9 of 12 cases. In one case the difference between the observed value and the reference values is system-immanent and in another case the difference is less than four percentage points (reference value 90 %).
authors.affiliation: Institut für Klinische Epidemiologie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck. Annika.Waldmann@krebsregister-sh.de
authors.forename: A
authors.initials: A
authors.lastname: Waldmann
authors.forename: S
authors.initials: S
authors.lastname: Adrich
authors.forename: N
authors.initials: N
authors.lastname: Eisemann
authors.forename: H
authors.initials: H
authors.lastname: Fauteck
authors.forename: I
authors.initials: I
authors.lastname: Grande-Nagel
authors.forename: F K W
authors.initials: FK
authors.lastname: Schaefer
authors.forename: M
authors.initials: M
authors.lastname: Vorkefeld
authors.forename: C
authors.initials: C
authors.lastname: Warnecke
authors.forename: K
authors.initials: K
authors.lastname: Weidner
authors.forename: C
authors.initials: C
authors.lastname: Wilke
authors.forename: A
authors.initials: A
authors.lastname: Katalinic
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D042241:Early Diagnosis; D005260:Female; D019983:Guideline Adherence / Q000592:standards; D006801:Humans; D008327:Mammography / Q000592:standards*; D008403:Mass Screening; D008875:Middle Aged; D011785:Quality Assurance, Health Care / Q000592:standards*; D019984:Quality Indicators, Health Care; D012680:Sensitivity and Specificity; D016217:Ultrasonography, Mammary / Q000592:standards; D055815:Young Adult