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. 2019 Nov 6;19:1047. doi: 10.1186/s12885-019-6240-x

Table 2.

Methodological Assessment

Reference Selection Comparability Outcome Total Points
Representativeness Selection Ascertainment Conflicted Interest Comparability Assessment FU Length Adequacy of FU
Cho JY [23] 1 1 1 1 1 0 1 0 6
Xiao L [24] 1 1 1 1 1 0 0 0 5
Komatsu S [ 25] 1 1 1 1 1 1 0 0 6
Zhang Y [26] 1 1 1 1 1 1 0 0 6
Chen J [27] 1 1 1 1 1 0 0 0 5
Yoon YI [28] 1 1 1 1 1 1 0 0 6
Guro H [29] 1 1 1 1 1 1 0 0 6
Rhu J [ 30] 1 1 1 1 1 1 0 0 6
Xu H [31] 1 1 1 1 1 1 0 0 6

1 = consistent with criteria and low risk of bias; 0 = not consistent with criteria and high risk of bias. N/A indicates not applicable, FU follow-up

A maximum of 2 points can be achieved for this criterion