Sensitivity of difference screening methods to detect gastric cancer by stage, NCSP for gastric cancer, 2002–2005.

UGIS, upper-gastrointestinal series; CI, confidence interval.aThe following stage definitions were applied (adapted from the SEER Cancer Statistics Review); localized, a neoplasm confined entirely to the stomach without serosal involvement; regional, a neoplasm that extends beyond the limits of the stomach and invades the surrounding tissue; distant, a neoplasm that spreads to parts of the body remote from the primary tumor; unknown, a neoplasm with insufficient or unavailable information to assign a stage.