Table 3

Quality assessment of included studies using the Effective Public Health Policy Projects Quantitative

Author (year)	Selection design	Study design	Confounders	Blinding	Data collection methods	Withdrawal and dropouts	Intervention integrity			Analysis				Rating
Author (year)	Selection design	Study design	Confounders	Blinding	Data collection methods	Withdrawal and dropouts	Participants received allocated intervention	Was consistency of intervention measured	Likelihood of contamination	Unit of allocation	Unit of analysis	Appropriate statistical methods	ITT	Rating
Ahrens et al (2003)21	Weak	Strong	Strong	Weak	Moderate	Weak	Unclear	Unclear	Unclear	Individual	Individual	Yes	Unclear	Weak
Bryce et al (2017)23	Weak	Moderate	Weak	Weak	Weak	Strong	80%–100%	Yes	Yes	Practice	Individual	Yes	No	Weak
Isaacs and Parry (1984)24	Moderate	Moderate	Moderate	Weak	Weak	Moderate	80%–100%	Yes	Unclear	Practice	Individual	Yes	Unclear	Weak
Narotzki et al (2013)22	Weak	Strong	Strong	Weak	Strong	Strong	80%–100%	Yes	Unclear	Individual	Individual	Yes	Yes	Weak