Table 2.

Cochrane Collaboration's tool for assessing risk of bias for the 17 identified RCTs.

Studies	Random sequence	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other bias	Overall risk of bias
Aarab et al. [26]	Low	Low	Low	Unclear	Low	Low	Unclear	Low risk
Andrén et al. [25]	Low	Low	Unclear	Low	Low	Unclear	Unclear	Low risk
Banhiran et al. [19]	High	High	High	High	Low	Low	Unclear	High risk
Barnes et al. [27]	Low	High	High	High	Low	Unclear	Unclear	High risk
Benoist et al. [28]	Low	Unclear	High	High	Unclear	Low	Unclear	High risk
Gagnadoux et al. [29]	High	High	High	High	Unclear	Unclear	Unclear	High risk
Gagnadoux et al. [30]	Low	High	High	High	Unclear	Low	Unclear	High risk
Ghazal et al. [31]	Low	High	High	High	Unclear	Unclear	Unclear	High risk
Gotsopoulos et al. [32]	Unclear	Unclear	Low	High	High	High	Unclear	High risk
Hoekema et al. [33]	Low	High	Unclear	Unclear	Low	Low	Unclear	High risk
Lam et al. [20]	Unclear	Unclear	Unclear	Unclear	Unclear	Unclear	Unclear	Unclear risk
Maguire et al. [21]	Low	Low	Unclear	Unclear	High	Unclear	Unclear	Unclear risk
Marklund et al. [34]	Low	Unclear	Low	High	High	High	Unclear	High risk
Phillips et al. [35]	Unclear	Unclear	Unclear	Unclear	Low	Low	Unclear	Unclear risk
Quinnel et al. [22]	Low	Unclear	High	Unclear	High	High	Unclear	High risk
Tegelberg et al. [23]	Low	Low	Unclear	Unclear	Low	Unclear	Unclear	Unclear risk
Wilhelmsson et al. [24]	Low	Low	Unclear	Unclear	Low	Unclear	Unclear	Unclear risk