109 Comparison of MRI response evaluation methods in rectal cancer: a multicentre and multireader validation study 6 Supplement 3 Tables detailing the interobserver agreement between all 22 individual study readers calculated as κ-values using quadratic kappa weighting. S3A shows results for the mrTRG, S3B for the modified mrTRG, S3C for the DWI patterns, and S3D for the split scar. Readers R1-R5 are 5 MR experts with >10 years’ experience in reading rectal MRI. Readers R6-R22 are general or abdominal radiologists ordered according to their level of experience in reading rectal MRI (calculated based on years of experience after completion of residency training multiplied by the number of rectal cancer cases assessed on MRI on a yearly basis).
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