Table 2.

Quality assessment of non-randomized comparative studies using ROBINS-I tool.

				ROBINS-I domains
Study	Bias due to confounding	Bias in selection of participants into the study	Bias in classification of interventions	Bias due to deviations from intended interventions	Bias due to missing data	Bias in measurement of outcomes	Bias in selection of the reported result	Overall ROBINS-I judgment
Zhu et al. (29)	Moderate	Low	Moderate	Low	Low	Moderate	Moderate	Moderate
Garcia et al. (25)	Moderate	Low	Low	Low	Low	Low	Moderate	Moderate