Table 2.

Analysis of the agreement between N stage according to the imaging modalities used for restaging and pathologic lymph node involvement after surgery

N stage	Under-stage	Agreement	Over-stage	κ	α	p-value
APCT	30 (11.1)	178 (66.0)	62 (23.0)	0.274	0.441	< 0.0001
Rectal MRI	8 (12.5)	46 (71.8)	10 (15.6)	0.401	0.549	0.001
TRUS	30 (24.8)	80 (66.1)	11 (9.1)	0.147	0.272	< 0.0001

Values are presented as number (%). APCT, abdomen and pelvic computed tomography; MRI, magnetic resonance imaging; TRUS, trans-rectal ultrasound.