3.2 Risk of Bias Assessment
We used RoB2.0 to assess the risk of bias in these articles. Except 2
articles (Kang X, et al; Lu S, et al), other studies have shown that
with randomization, so the risk of deviation (SG) from sequence
generation was assessed as ”low”. The experimental groups in the two
studies were not randomized, so the risk of SG bias in this group was
assessed as ”high”. Three studies (Zhang L, et al; Hou J, et al; Li Y,
et al) described allocation concealment (AC), participant blindness
(BPt), and these were decided “low risk”. The other 54 studies did not
describe the treatment course of AC and were therefore considered to be
at “unclear risk”. In cancer trials, it is difficult to blind
participants. For selective outcome reporting (SOR), the study was
assessed as ”low-risk” only if the objectives and outcome measures
described in the methods section are in the results section. Our results
show TRR symmetry in funnel plots of the 57 studies, indicating a lower
risk of publication bias.