Prognostic role of ultrasonography staging in patients with anal cancer

Table 1 Comparison of patients staged according to the ultrasound and clinical American Joint Committee on Cancer staging systems and factors potentially affecting survival

	Ultrasonography staging						Clinical AJCC staging
	n (%)	Recurrence n (%)	Age > 65, n (%)	Male, n (%)	HIV, n (%)	ASA score ≥ 3, n (%)	n (%)	Recurrence, n (%)	Age ≥ 65, n (%)	Male, n (%)	HIV, n (%)	ASA score ≥ 3, n (%)
T1N0	4 (8)	0	2 (50)	3 (75)	1 (25)	1 (25)	9 (19)	4 (44)	4 (44)	2 (22)	1 (11)	3 (33)
T2N0	19 (40)	5 (26)	7 (37)	5 (26)	4 (21)	4 (21)	6 (12)	0	4 (67)	2 (33)	1 (17)	1 (17)
T3N0	5 (10)	2 (20)	1 (20)	2 (40)	3 (60)	1 (20)	2 (4)	1 (50)	0	2 (100)	2 (100)	1 (50)
T4N0	1 (2)	1 (100)	0	0	0	1 (100)	0	0	0	0	0	0
T1N+	1 (2)	1 (100)	0	1 (100)	0	1 (100)	3 (6)	0	1 (33)	2 (67)	1 (33)	1 (33)
T2N+	8 (17)	8 (100)	1 (13)	4 (40)	4 (50)	2 (25)	12 (25)	7 (58)	4 (33)	4 (33)	4 (33)	4 (33)
T3N+	5 (10)	5 (100)	4 (80)	1 (20)	0	2 (40)	10 (21)	5 (50)	2 (20)	2 (20)	3 (30)	2 (20)
T4N+	5 (10)	5 (100)	0	1 (20)	2 (40)	2 (40)	6 (13)	3 (50)	0	2 (33)	2 (33)	2 (33)

AJCC: American Joint Committee on Cancer; ASA: American Society of Anaesthesiologists; HIV: Human immunodeficiency virus.