Defining response to radiotherapy in rectal cancer using magnetic resonance imaging and histopathological scales

Table 4 Proportion of poor responders in the literature according to regression grades

TRG grading system	No. of reports (total 25 reports from 21 studies)	Proportion of poor responders	Lower limit of confidence Interval	Upper limit of confidence Interval
Mandard	8	34.9	22.8	49.4
Dworak	8	47.4	32.5	62.7
Junker/Muller	2	50.8	28.8	72.5
Japanese	2	35.0	20.4	52.9
Wheeler	1	38.9	30.8	47.7
Bujko/Glynne-Jones	1	22.1	15.8	30.0
Rodel based on Dworak	1	52.2	44.9	59.5
Rodel based on Wittekind (modified Dworak)	1	14.7	10.6	19.9
Cologne	1	7.1	3.2	14.8