|
Study
|
Selection
|
Comparability
|
Outcome
|
TOTAL
|
Quality
|
|---|
|
REC
|
SNEC
|
AE
|
DO
|
SC
|
AF
|
AO
|
FU
|
AFU
|
|---|
|
Ichihara 2020
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
0
|
1
|
6
|
Moderate
|
|
Wang 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
0
|
1
|
6
|
Moderate
|
|
Popinat 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
7
|
High
|
|
Naik 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
7
|
High
|
|
Magri 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
7
|
High
|
|
Labadie 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
7
|
High
|
|
Kulkarni 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
0
|
0
|
1
|
6
|
Moderate
|
|
Kichenadasse 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
7
|
High
|
|
De Giorgi 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
7
|
High
|
|
Cortellini 2019
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
0
|
1
|
6
|
Moderate
|
|
Richtig 2018
|
1
|
1
|
1
|
1
|
0
|
0
|
0
|
1
|
1
|
6
|
Moderate
|
|
Zhi 2018
|
1
|
1
|
1
|
1
|
0
|
0
|
0
|
0
|
1
|
5
|
Moderate
|
|
McQuade 2018
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
7
|
High
|
- REC, representativeness of the exposed cohort; SNEC, selection of the non-exposed cohort; AE, ascertainment of exposure; DO, demonstration that outcome of interest was not present at start of study; SC, study controls for age, sex; AF, study controls for any additional factors (chemoradiotherapy, curative resection); AO, assessment of outcome; FU, follow-up long enough (36 M) for outcomes to occur; AFU, adequacy of follow-up of cohorts. “1” means that the study is satisfied the item and “0” means the opposite situation
