Breast Tumor Character- istics as Predictors of Mammographic Detection: Comparison of Interval- and Screen-Detected Cancers

screening is useful for detecting early breast cancer, some tumors are de-tected in the interval between screening examinations. This study attempted to characterize fully the tumors detected in the two different manners. Methods: Our study utilized a case–control de-sign and involved a cohort of women undergoing mammographic screening within the defined population of a health maintenance organization (the Group Health Cooperative of Puget Sound). Women were classified as hav-ing “interval ” or “interval-detected” cancers (n = 150) if their diagnosis wa