Efficacy of hybrid minimally invasive esophagectomy vs open esophagectomy for esophageal cancer: A meta-analysis

Table 2 Baseline characteristics

Ref.	Tumor location		Histological subtype		Pathological stage		ASA risk score
	Upper/Middle/ Lower		ACA/SCC		0-I-II/ III-IV		1/2/3
	HMIE	OE	HMIE	OE	HMIE	OE	HMIE	OE
Yun et al[11]	0/18/35	0/18/44	NA	NA	48/5	45/17	NA	NA
Scarpa et al[14]	0/25/9	0/29/5	24/10	24/10	29/5	29/5	5/22/7	4/17/13
Briez et al[13]	0/54/86	0/56/84	57/83	57/83	92/48	89/51	20/102/18	22/94/24
Mariette et al[8]	0/32/71	1/31/72	57/46	66/38	48/50	52/48	25/61/17	34/58/12
Glatz et al[15]	0/8/52	0/8/52	46/14	47/13	44/15	41/19	NA	NA
Rinieri et al[17]	60/10/0	63/7/0	50/20	55/15	52/18	49/21	9/48/13	14/40/16
Paireder et al[9]	NA	NA	10/4	11/1	7/7	8/4	NA	NA
Rolff et al[22]	NA	NA	NA	NA	NA	NA	17/28/12	41/80/39
Parameswaran et al[10]	NA	NA	27/3	16/3	18/31	8/11	NA	NA
Smithers et al[12]	8/68/208	0/3/47	199/74	100/7	183/108	36/75	12/200/98	6/68/38
Lee et al[16]	2/34/8	9/46/9	1/43	5/59	39/6	49/15	NA	NA
Findlay et al[19]	NA	NA	NA	NA	NA	NA	NA	NA
Safranek et al[20]	0/1/24	0/1/20	29/3	43/3	18/16	17/29	NA	NA
Shiraishi et al[21]	NA	NA	NA	NA	NA	NA	NA	NA
Kubo et al[23]	8/21/13	3/36/34	NA	NA	28/14	41/33	NA	NA
Yanasoot et al[24]	2/8/6	11/28/15	1/15	5/49	6/10	19/35	NA	A
Khan et al[18]	NA	NA	28/3	65/25	4/91	5/83	NA	NA

NA: Not available; ACA: Adenocarcinoma; SCC: Squamous cell carcinoma; ASA: American Society of Anesthesilogists; HMIE: Hybrid minimally invasive esophagectomy; OE: Open esophagectomy.