Table 3.

Quality Assessment

Study	Selection Bias	Study Design	Confounders	Blinding	Data Collection Methods	Withdrawals and Drop-outs	Total
Adamo et al. 2016 [22]& Goldfield et al. 2016 [24]	Moderate	Strong	Weak	Moderate	Strong	Strong	Moderate
Engelen et al. 2013 [34]	Weak	Weak	Moderate	Moderate	Strong	Strong	Weak
O’Dwyer et al. 2012 [36]	Weak	Weak	Weak	Weak	Strong	Strong	Weak
Tortella et al. 2016 [35]	Weak	Weak	Weak	Weak	Strong	Weak	Weak