Table 2.

Risk of bias.

Author, Year	Bias Arising from the Randomization Process	Bias Due to Deviations from Intended Intervention	Bias Due to Missing Outcome Data	Bias in Measurement of the Outcome	Bias in Selection of the Reported Results	Overall Bias
Liu et al., 2021, China [10]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern
Tan et al., 2022, China [11]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern
Lu et al., 2022, China [13]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Hu et al., 2022, China [14]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Guo et al., 2022, China [12]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Ye et al., 2023, China [16]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern
Liu et al., 2023, China [15]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern