title: Inter- and intra-observer assessment of the Galactogram Imaging Classification System (GICS).
abstract: BACKGROUND
  A new system for the classification of galactograms is reported. To date, there is no universally accepted classification system.
  
  
  OBJECTIVE
  To evaluate inter- and intra-observer agreement of the Galactogram Imaging Classification System (GICS) MATERIAL AND METHODS: Six observers with different levels of experience retrospectively evaluated 30 galactograms using the GICS. Images were reviewed independently twice within a four-week period. The kappa statistic was calculated for intra- and inter-observer variability.
  
  
  RESULTS
  The kappa for inter-observer agreement was moderate to substantial (range 0.41-0.72). Overall, the intra-observer kappa values were excellent (range 0.80-0.94).
  
  
  CONCLUSIONS
  The present study shows a good to very good inter- and intra-observer agreement with the GICS. We believe the GICS can be incorporated into daily practice.
authors: Department of Radiology, Serrania de Ronda General Hospital, Spain.
authors: Carolina
authors: C
authors: Torres-Alés
authors: Juan de Dios
authors: Jde D
authors: Berná-Serna
authors: Juan de Dios
authors: Jde D
authors: Berná-Mestre
authors: Joaquín
authors: J
authors: Sola-Pérez
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D016009:Chi-Square Distribution; D003937:Diagnosis, Differential; D005122:Exudates and Transudates / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008327:Mammography / Q000379:methods*; D008875:Middle Aged; D009558:Nipples / Q000000981:diagnostic imaging* / Q000473:pathology; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012189:Retrospective Studies