World Journal of Surgical Oncology

Table 3 Characteristics of the matched study population in the SA-2

From: Neoadjuvant vs definitive concurrent chemoradiotherapy in locally advanced esophageal squamous cell carcinoma patients

		Surgery [MIE]		CCRT		Standardized difference^a
		Number or mean (sd)^a	(%)^a	Number or mean (sd)^a	(%)^a	Standardized difference^a
Age		56.38 (8.21)		55.35 (10.58)		0.11
Gender	Female	4	(5)	4	(5)	0.00
Gender	Male	78	(95)	78	(95)
Residency	Non-north	57	(70)	52	(63)	0.13
Residency	North	25	(30)	30	(37)
Tumor size	≤ 5 cm	31	(38)	31	(38)	0.00
Tumor size	> 5 cm	51	(62)	51	(62)
Differentiation	Poorly/undifferentiated	31	(38)	30	(37)	0.03
Differentiation	Well/moderately	51	(62)	52	(63)
RT delivery	Non-IGRT	70	(85)	68	(83)	0.07
RT delivery	IGRT	12	(15)	14	(17)
Institution	Low volume	23	(28)	25	(30)	0.05
Institution	High volume	59	(72)	57	(70)
Use of PET	Without	7	(9)	11	(13)	0.16
Use of PET	With	75	(91)	71	(87)

The nonoverlapped covariable (location) was not included in this matching
sd standard deviation, RT radiotherapy, IGRT image-guided RT, PET positron emission tomography, MIE minimally invasive esophagectomy, CCRT concurrent chemoradiotherapy
^aRounded

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ISSN: 1477-7819

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