Table 1.

Results of methodological quality assessment of included studies—Critical Appraisal Skills Programme (CASP).

Study	Item											Total
	1	2	3	4	5	6	7	8	9	10	11
Bade M et al. 2016 [18]	Yes	Yes	Yes	No	Yes	Yes	No	p < 0.05	Yes	Yes	Yes	9
Cai C et al. 2017 [19]	Yes	Yes	Yes	No	Yes	Yes	Yes	95% CI p < 0.01	No	Yes	Yes	9
Fukuda TY et al. 2021 [20]	Yes	Yes	Yes	No	Yes	Yes	No	95% CI	Yes	Yes	No	8
Jeong UC et al. 2015 [21]	Yes	Yes	Yes	Cannot tell	Yes	Yes	Yes	p < 0.01	No	Yes	Yes	9
Kendal KD et al. 2014 [22]	Yes	Yes	Yes	No	Yes	Yes	No	95% CI	Yes	Yes	No	8
Kim B and Yim 2020 [23]	Yes	Yes	Yes	No	Yes	Yes	Yes	p < 0.05	Yes	Yes	Yes	10
Lee SW et al. 2014 [24]	Yes	Yes	Yes	Cannot tell	Yes	Yes	Yes	p < 0.01	Yes	Yes	Yes	10

CASP questionnaire items → 1: clearly defined question; 2: random assignment; 3: patients considered until the end; 4: blinding; 5: similar groups at baseline; 6: equally treated groups; 7: longer treatment effect; 8: accuracy of effect; 9: applicability to your setting or local population; 10: all outcomes considered; 11: benefits justify risk and cost. Abbreviations → CI: confidence interval.