Table 3.

Risk of bias assessment using the Cochrane ROBINS-I tool.

First Author (year of publication)	Confounders	Subjet Selection	Classification of intervention	Deviation in intervention	Missiong Data	Biased Measurements	Biased Reporting	Overall Bias Rating
Yang et al (2018)	Moderate	Moderate	Low	Low	Low	Low/Moderate	Low	Moderate
Prost et al (2019)	Moderate	Low	Moderate	Low	Low	Low/Moderate	Low	Moderate
Patel et al (2020)	Moderate	Moderate	Low	Low	Low	Low/Moderate	Low	Moderate
Jin et al (2020)	Moderate	Moderate	Low	Low	Low	Low/Moderate	Low	Moderate
Ge et al (2015)	Moderate	Moderate	Low	Low	Low	Low/Moderate	Low	Moderate