Table A2. Quality of quantitative studies reviewed using the Effective Public Healthcare Panacea Project (EPHPP) quality assessment tool (n=7).

Study (in alphabetical order)	Selection bias	Study design	Confounding	Blinding	Data collection method	Withdrawal	Final rating
Khani Jeihooni et al., 2021	Moderate	Strong	Strong	Moderate	Strong	Weak	Moderate
Chu et al., 2021	Moderate	Moderate	Strong	Weak	Weak	Strong	Weak
Larkey et al., 2012	Moderate	Strong	Strong	Moderate	Weak	Weak	Weak
Lee et al., 2018	Weak	Strong	Weak	Moderate	Weak	Strong	Weak
Ma et al., 2022	Weak	Moderate	Strong	Weak	Weak	Strong	Weak
McDonough et al., 2016	Moderate	Moderate	Strong	Weak	Moderate	Weak	Weak
Olubodun et al., 2022	Moderate	Strong	Weak	Moderate	Weak	Moderate	Weak