Facility Mammography Volume in Relation to XXXX Screening Outcomes.

@entity5 @entity1 @entity0
OBJECTIVES: To clarify the relationship between facility-level mammography interpretive volume and @entity0 screening outcomes. METHODS: We calculated annual mammography interpretive volumes from 2000-2009 for 116 facilities participating in the U.S. @entity0 Surveillance Consortium (BCSC). Radiology, pathology, @entity5 registry, and @entity1 's self-report information were used to determine the indication for each exam, @entity5 characteristics, and @entity1 characteristics. We examined the effect of annual total volume and percentage of mammograms that were screening on @entity5 detection rates using multinomial logistic regression adjusting for age, race/ethnicity, time since last mammogram, and BCSC registries. "Good prognosis" @entity5 were defined as screen-detected invasive @entity5 that were <15   mm, early stage, and lymph node negative at diagnosis. RESULTS: From 3,098,481 screening mammograms, 9,899 @entity5 were screen-detected within one year of the exam. Approximately 80% of facilities had annual total interpretive volumes of >2,000 mammograms, and 42% had >5,000. Higher total volume facilities were significantly more likely to diagnose invasive @entity5 with good prognoses (odds ratio [OR] 1.32; 95% confidence interval [CI] 1.10-1.60, for total volume of 5,000-10,000/year v. 1,000-2,000/year; p-for-trend <0.001). A concomitant decrease in @entity5 with poor prognosis was seen (OR 0.78; 95%CI 0.63-0.98 for total volume of 5,000-10,000/year v. 1,000-2,000/year). CONCLUSIONS: Mammography facilities with higher total interpretive volumes detected more good prognosis invasive @entity5 and fewer poor prognosis invasive @entity5 , suggesting that @entity1 attending these facilities may be more likely to benefit from screening.
