2.

PSM评价后的单因素和多因素COX回归分析

Univariate and multivariate COX regression analysis after PSM evaluation

Variable	cases (n)	Univariate				Multivariate
		P	HR	95%CI		P	HR	95%CI
Gender		0.131
Male	317
Female	59		0.750	0.517~1.089
Age (year)		0.696
≤72	328
≥73	48		1.076	0.745~1.553
Primary site		0.004				0.009
Upper third of esophagus	5
Middle third of esophagus	33		1.034	0.311~3.435			0.997	0.300~3.310
Lower third of esophagus	309		1.034	0.311~3.435			0.997	0.300~3.310
Abdominal esophagus	4		4.199	0.932~18.924			3.182	0.705~14.361
Overlapping lesion of esophagus	15		1.153	0.321~4.142			0.864	0.240~3.118
Thoracic esophagus	10		0.484	0.115~2.033			0.445	0.106~1.871
Grade		0.410
Ⅰ	13
Ⅱ	141		0.757	0.394~1.455
Ⅲ	216		0.821	0.432~1.560
Ⅳ	6		1.531	0.522~4.489
Pathological type		0.992
Squamous cell carcinoma	60
Adenocarcinoma	285		0.985	0.700~1.386
Others	31		0.968	0.565~1.656
T stage		0.089
T1	20
T2	40		0.788	0.384~1.619
T3	284		1.129	0.614~2.074
T4	32		1.649	0.807~3.372
M stage		0.015				0.012	1.827	1.140~2.929
M0	352
M1	24		1.792	1.121~2.865
Tumor size (mm)		0.230
≤72	293
≥73	83		1.197	0.892~1.607
Race		0.391
White	332
Black	23		1.471	0.930~2.327
Asian	17		0.938	0.481~1.831
Others	4		1.417	0.352~5.708
LNR		0.000				0.000	1.827	1.140~2.929
< 0.16	188
≥0.16	188		1.917	1.917
Number of lymph nodes tested		0.216
≤8	159		0.854	0.665~1.097
≥9	217