Table 1.

Variables/indicators for the evaluation.

Determinants and Impacts	Variables/Indicators
Characteristics and determinants (inputs)	Goals and objectives
	Involved stakeholders and collaborators
	Design and development of the project
	Inception and sponsorship/financing of the project
	Tasks, roles and behaviors
	Collaboration and Trust among participants
Intermediate results (outputs)	Activation and development of capacities and skills
	Collaborative climate
	Participation in decision-making processes
	Quality of the experience and satisfaction of participants
Multi-level final impacts (outcomes)	For providers
	Healthy lifestyle awareness and knowledge transfer
	Improvements in the health promotion services
	Better results in terms of people reached and in economic terms
	For involved lay-actors
	Impact on healthy lifestyle awareness and knowledge
	Improved lifestyle related behaviors
	Empowerment and activation towards peers
	For community/society
	Effectiveness (the problem-solving capacity of the co-production initiative)
	Impact on healthy lifestyle awareness and knowledge of the community
	Activation and empowerment of the community (potential ‘halo-effect’)
	Costs for the healthcare system

The variables referred to the Multi-level final impacts are divided according to the measurement level. Each level is explicitly reported and highlighted in bold character.