Endoscopic submucosal tunnel dissection for early esophageal squamous cell carcinoma in patients with cirrhosis: A propensity score analysis

Table 1 Baseline characteristics of unmatched and matched cohort

Variable	Unmatched cohort			Matched cohort
	Cirrhosis, n = 28	Noncirrhosis, n = 537	P value	Cirrhosis, n = 25	Noncirrhosis, n = 75	P value
Sex, male	22 (78.6)	373 (69.5)	0.305	19 (76.0)	56 (74.7)	0.894
Age, yr (SD)	59.8 (8.2)	62.5 (7.9)	0.081	59.3 (8.5)	60.8 (8.3)	0.424
Location			0.027			0.427
Upper	3 (10.7)	42 (7.8)		2 (8.0)	2 (2.7)
Middle	12 (42.9)	360 (67.0)		14 (56.0)	42 (56.0)
Lower	13 (46.4)	135 (25.2)		9 (36.0)	31 (41.3)
Circumference			0.200			0.637
> 1/2, < 3/4	16 (57.1)	369 (68.7)		14 (56.0)	46 (61.3)
≥ 3/4	12 (42.9)	168 (31.3)		11 (44.0)	29 (38.7)
Macroscopic type[20]			< 0.01			0.137
IIa + IIb/Is/IIa	4 (14.3)	281 (52.3)		6 (24.0)	7 (9.3)
IIb	14 (50.0)	231 (43.0)		13 (52.0)	52 (69.3)
IIb + IIc/IIc/IIa + IIc	10 (35.7)	25 (4.7)		6 (24.0)	16 (21.4)
Area, cm2 (SD)1	13.5 (6.7)	13.8 (9.6)	0.828	14.1 (6.9)	13.6 (8.9)	0.810
Invasion depth			0.379			1.000
EP/LPM	23 (82.1)	471 (87.7)		21 (84.0)	62 (82.7)
MM/SM1	5 (17.9)	66 (12.3)		4 (16.0)	13 (17.3)

¹The area was calculated by multiplying the length by the width.

Values are mean or n (%). EP: Mucosal epithelium; LPM: Lamina propria mucosae; MM: Muscularis mucosae; SM1: Infiltrate the upper 1/3 of the submucosa; SD, standard deviation.