Adenosquamous carcinoma may have an inferior prognosis to signet ring cell carcinoma in patients with stages I and II gastric cancer

Table 2 Patient characteristics dichotomized by histological type after propensity score matching, n (%)

Characteristic	SRC	ASC	Total	P value
	n = 370 (79.6)	n = 95 (20.4)	n = 465 (100)
Age (yr)				0.754
≤ 60	131 (35.4)	32 (33.7)	163 (35.1)
> 60	239 (64.6)	63 (66.3)	302 (64.9)
Gender				0.809
Male	272 (73.5)	71 (74.7)	343 (73.8)
Female	98 (26.5)	24 (25.3)	122 (26.2)
Race				0.845
White	290 (78.4)	74 (77.9)	364 (78.3)
Black	44 (11.9)	13 (13.7)	57 (12.3)
Others	36 (9.7)	8 (8.4)	44 (9.5)
Marital status				0.901
Not married	84 (22.7)	21 (22.1)	105 (22.6)
Married	286 (77.3)	74 (77.9)	360 (77.4)
Tumor size (mm)				0.828
≤ 50	159 (43.0)	42 (44.2)	201 (43.2)
> 50	211 (57.0)	53 (55.8)	264 (56.8)
Stage				0.365
I	94 (25.4)	21 (22.1)	115 (24.7)
II	55 (14.9)	20 (21.1)	75 (16.1)
III	77 (20.8)	15 (15.8)	92 (19.8)
IV	144 (38.9)	39 (41.1)	183 (39.4)
Tumor depth				0.598
T1	77 (20.8)	16 (16.8)	93 (20.0)
T2	156 (42.2)	45 (47.4)	201 (43.2)
T3	84 (22.7)	18 (18.9)	102 (21.9)
T4	53 (14.3)	16 (16.8)	69 (14.8)
LN metastasis				0.151
N0	151 (40.8)	31 (32.6)	182 (39.1)
N1	134 (36.2)	46 (48.4)	180 (38.7)
N2	69 (18.6)	16 (16.8)	85 (18.3)
N3	16 (4.3)	2 (2.1)	18 (3.9)
Distant metastasis				0.840
No	257 (69.5)	67 (70.5)	324 (69.7)
Yes	113 (30.5)	28 (29.5)	141 (30.3)
Radiotherapy				0.786
No	232 (62.7)	61 (64.2)	293 (63.0)
Yes	138 (37.3)	34 (35.8)	172 (37.0)
Surgery				0.883
No	108 (29.2)	27 (28.4)	135 (29.0)
Yes	262 (70.8)	68 (71.6)	330 (71.0)

SRC: Signet ring cell carcinoma; ASC: Adenosquamous carcinoma; TNM: Tumor-node-metastasis; LN: Lymph node.