Table 5.

The risk of bias and quality of evidence for all RCTs included in the systematic review and meta‐analysis.

Study	Risk of the bias domains
	D1	D2	D3	D4	D5	Overall
Dellabella et al. (2018) [9]
Li et al. (2014) [10]
Singh et al. (2009) [11]

Domains:

D1: Bias arising from the randomization process.

D2: Bias due to deviations from independent intervention.

D3: Bias due to missing outcome data.

D4: Bias in measurement of the outcome.

D5: Bias in selection of the reported results.

Judgement:

, Some concerns.

, Low.