Table II.

Recurrence patterns according to programmed death-ligand 1 expression.

Variables	Low expression (N=82)	High expression (N=93)	P-value
Nο. of involved organs			0.418
1	35 (42.7)	15 (16.1)
2	4 (4.9)	4 (4.3)
3	1 (1.2)	0 (0)
Recurrence pattern			0.030
Local recurrence	5 (6.1)	7 (7.5)
Anastomotic site	1 (1.2)	2 (2.2)	0.636
Perirectum	5 (6.1)	6 (6.5)	0.923
Pelvic cavity	3 (3.7)	1 (1.1)	0.254
Systemic recurrence	35 (42.7)	12 (12.9)
Liver	21 (25.6)	7 (7.5)	0.001
Lung	5 (6.1)	3 (3.2)	0.364
Peritoneum	3 (3.7)	2 (2.2)	0.550
Extraregional lymph nodea	3 (3.7)	2 (2.2)	0.550
Abdominal wall	1 (1.2)	0 (0)	0.286
Adrenal gland	1 (1.2)	0 (0)	0.286
Ureter	1 (1.2)	0 (0)	0.286
Ovary	1 (1.2)	0 (0)	0.286
Supraclavicular lymph node	1 (1.2)	0 (0)	0.286

^aThe extraregional lymph node includes the para-aortic and lateral pelvic lymph node.