Table 1.

Data sources and measured constructs aligned with RE-AIM dimensions

Dimension	Definition	Measured construct	Data source
Reach	The absolute number, proportion, and representativeness of individuals who are willing to participate in an initiative, intervention, or program.	Number and characteristics of participants and non-participants, reasons for non-participation	Administrative data in GeMuKi-Assist, focus groups with multi-professional providers, paper survey
Effectiveness	The impact of an intervention on important outcomes, including potential negative effects, quality of life, and economic outcomes.	Proportion of participants with excessive weight gain, infant body composition and weight development	Administrative data in GeMuKi-Assist
		Maternal lifestyle, knowledge, infant feeding, infant diet and physical activity	Electronic survey
Adoption	The absolute number, proportion, and representativeness of settings and intervention agents (people who deliver the program) who are willing to initiate a program.	Proportion and characteristics of participating multi-professional practices, reasons for non-participation and drop-out of practices	Administrative data in GeMuKi-Assist, documents and publicly available statistics
Implementation	Setting level: the intervention agents’ fidelity to the various elements of an intervention’s protocol, including consistency of delivery as intended and the time and cost of the intervention.	Implementation of brief lifestyle advice intervention (how and by whom?)	Focus groups with multi-professional providers,
		Intervention costs: human resources and time, health service use, implementation costs and training	Administrative data in GeMuKi-Assist, interviews with study participants, social health insurance claims data, documents
		Utilization of the GeMuKi Assist Counseling Tool, local adaptations of the intervention	Focus groups with multi-professional providers, interviews with study participants, administrative data in GeMuKi-Assist
	Individual level: the clients’ use of the intervention strategies.	Utilization of GeMuKi-Assist App, goal setting, links etc. Attainment of lifestyle change goals	Interviews with study participants, administrative data in GeMuKi-Assist
Maintenance	Setting level: the extent to which a program or policy becomes institutionalized or part of the routine organizational practices and policies.	Providers becoming experienced in delivering lifestyle advice, lifestyle advice becoming a routine component of practice processes	Focus groups with multi-professional providers, administrative data in GeMuKi-Assist
	Individual level: the long-term effects of a program on outcomes after 6+ months after the most recent intervention contact.	Maintenance of lifestyle changes and weight, drop out of study participants	Administrative data in GeMuKi-Assist, electronic survey