Table 3.

Data extraction fields

General information	Authors
	Publication year
	Journal
	Country of study
Study characteristics	Intervention aim
	Study aim
	Study design
	Study duration, including duration of pre-intervention period and duration of follow-up
Study participants	Description of population of interest
	Method of recruitment
	Inclusion/exclusion criteria for study participants
	Sample size calculation/power calculation
Intervention characteristics	Enacting government authority
	Description of policy intervention
	Description of intervention groups
	Number of intervention groups
	Intervention duration and timing
Data analysis	Type of analyses conducted
	Statistical tests conducted
	Confounders
Intervention effects	Baseline and post-intervention results
	Estimates of effect, including by time or subgroup as appropriate
	Secondary outcomes: beneficial outcomes
	Secondary outcomes: adverse events