Table 2 C-index of each MRI finding for survival outcome.

From: Differences in prognostic relevance of rectal magnetic resonance imaging findings before and after neoadjuvant chemoradiotherapy

Variable [reference]

Overall survival

Disease free survival

Local recurrence rate

mrT4 [mrT3]

0.627 (0.568–0.686)

0.605 (0.550–0.660)

0.704 (0.596–0.812)

mrN(+) [mrN(−)]

0.637 (0.578–0.696)

0.609 (0.554–0.664)

0.715 (0.607–0.823)

mrMRF(+) [mrMRF(−)]

0.629 (0.570–0.688)

0.613 (0.558–0.668)

0.716 (0.608–0.824)

mrEMVI(+) [mrEMVI(−)]

0.656 (0.597–0.715)

0.634 (0.579–0.689)

0.720 (0.612–0.828)

ymrT3–4 [ymrT0–2]

0.636 (0.577–0.695)

0.621 (0.566–0.676)

0.708 (0.600–0.816)

ymrN(+) [ymrN(−)]

0.672 (0.613–0.731)

0.661 (0.606–0.716)

0.717 (0.609–0.825)

ymrMRF(+) [ymrMRF(−)]

0.637 (0.578–0.696)

0.617 (0.562–0.672)

0.707 (0.599–0.815)

ymrEMVI(+) [ymrEMVI(−)]

0.680 (0.621–0.739)

0.647 (0.592–0.702)

0.728 (0.620–0.836)

mrTRG G4–5 [mrTRG G1–3]

0.652 (0.593–0.711)

0.622 (0.567–0.677)

0.722 (0.614–0.830)

  1. Age, sex, location and CEA were adjusted.
  2. Bold numbers indicate the highest c-index among pre- and post-CRT MRI findings for each survival outcome.
  3. mr; magnetic resonance imaging before neoadjuvant chemoradiotherapy, ymr; magnetic resonance imaging after neoadjuvant chemoradiotherapy, T; tumour stage, N; lymph node stage, MRF; mesorectal fascia involvement, EMVI; extramural venous invasion, mrTRG; magnetic resonance tumour regression grade, G; grade, CRT; neoadjuvant chemoradiotherapy.
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