Outcomes of curative esophageal cancer surgery in elderly: A meta-analysis

Table 1 Risk of bias per included study for meta-analysis

Ref.	Age	A	B	C	D	E	F	G	H	Stars
Akutsu et al[20]	75	1	-	1	-	1	1	1	-	5
Baranov et al[13]	75	1	1	1	-	1	1	1	-	6
Klevebro et al[22]	75	1	1	1	1	-	1	1	-	6
Li et al[23]	75	1	1	1	1	-	1	1	-	6
Schweigert et al[25]	75	1	1	1	1	-	1	1	-	6
Yang et al[26]	75	1	1	1	1	1	1	1	-	7
Kanda et al[21]	75	1	1	1	1	1	1	1	-	7

A: Representativeness of the exposed cohort; B: Selection of the non-exposed cohort; C: Ascertainment of exposure; D: Demonstration that outcome of interest was not present at start of study; E: Comparability of cohorts on the basis of the design or analysis; F: Assessment of outcome; G: Was follow-up long enough for outcomes to occur; and H: Adequacy of follow up of cohorts.