The correlation between iFOBT and pathology criteria that positive ability of iFOBT is higher for tubular adenomatous polyp, tubulovillous adenomatous polyp, cancer than for villous adenomatous polyp (p=0.027). The correlation between iFOBT and dysplasia standard (mild, moderate and severe) of polyp that positive ability of iFOBT is higher as dysplasia standard is higher (p=0.004), positive ability of iFOBT for advanced polyp is higher than one for benign polyp (p=0.0001).