Tumor regression grades: Potential outcome predictor of locally advanced rectal adenocarcinoma after preoperative radiotherapy

Table 4 Tumor regression grade and clinical long-term outcome

Variables		P value
5-yr OS
Mandard good response (TRG1/2)	96.4% ± 2.0%	0.0021
Mandard good response (TRG3-5)	83.1% ± 4.2%
ypCR (Mandard TRG1)	100.00%2	0.6911
Mandard partial response (TRG2)	86.68%2
5-yr DFS
Mandard good response (TRG1/2)	92.0% ± 3.5%	0.0001
Mandard good response (TRG3-5)	72.3% ± 3.8%
ypCR (Mandard TRG1)	100.00%2	0.5021
Mandard partial response (TRG2)	86.68%2

¹Log rank test;

²No statistics were computed because all cases were censored. Univariate analysis follow-up: mean 56 mo (range: 3-125 mo). OS: Overall survival; DFS: Disease-free survival; TRG: Tumor regression grades.