Effect of perioperative branched chain amino acids supplementation in liver cancer patients undergoing surgical intervention: A systematic review

Table 1 Risk of bias assessment of non-randomised studies, using Cochrane ROBINS-1 tool

Ref.	Confounding factor bias	Selection bias	Bias in classification of interventions	Bias due to deviations from intended intervention	Bias due to missing data	Bias in measurement of outcomes	Bias in selection of the reported result	Overall bias
Ardito et al[45]	Low	Low	Low	Low	Low	Low	Low	Low
Kobayashi et al[36]	Low	Moderate	Low	Low	Low	Low	Moderate	Moderate
Okabayashi et al[33]	Low	Low	Low	Low	Low	Low	Low	Low
Shirabe et al[37]	Low	Low	Low	Low	Low	Low	Low	Low