Table 3. Comparisons in detection dates depending on anatomical regions.

Open vs. hidden areas	F	A	DX	E
P value	N/A	<0.001	<0.001	<0.001

A, earliest image with which cancer was diagnosed when the radiographs were viewed without time constraints, distractors, and side-by-side cropped images; DX, earliest image suggestive of cancer when viewing side-by-side cropped radiographs; E, earliest image suggestive of a lesion when viewing side-by-side cropped radiographs; F, image at the time of actual diagnosis. N/A, not applicable.