93 Comparison of MRI response evaluation methods in rectal cancer: a multicentre and multireader validation study 6 Table 2 Patient and reader characteristics Patient characteristics N= % Total 90 100% Mean age (± SD) 65 (± 11) Sex Male 52 58% Female 38 42% Baseline stage (MRI) cT-stage cT1-2 3 3% cT3 68 76% cT4 18 20% cN-stage cN0 12 13% cN1 19 21% cN2 59 66% Final response (pathology) yT-stage yT01 27 30% yT1-2 22 24% yT3 37 41% yT4 4 4% yN-stage yN01 65 72% yN1 17 19% yN2 8 9% TRG TRG11 27 30% TRG2 17 19% TRG3 29 32% TRG4 15 17% TRG5 2 2% Complete response vs. Residual tumor Complete response (TRG1 / ypT0) 27 30% Residual tumor (TRG2-5 / ypT1-4) 63 70% Reader characteristics N= % Total 22 100% Experience Experts 5 23% Abdominal/general radiologists 17 77% Workplace Comprehensive cancer center 8 36% University hospital 8 36% General hospital 3 14% other 3 14%
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