Table 1.

Cost items of primary school-based lifestyle interventions

Cost type	Cost item	Stakeholder perspective
		Education	Household and leisure	Labor and social security	Healthcare
PersonnelC	School personnel
	Program coordinator	X
	School project leader	X
	Teacher	X
	Teaching assistant	X
	Volunteers, carers, and beneficiaries from the household sector	X	XA	XA
	External parties from the leisure sector	X	XA
	Personnel from the local government (e.g., cross-discipline coordinators)	X		XA
	Personnel from the labor sector (e.g., pedagogical staff from childcare partners, catering personnel)	X		XA
	Health staff (e.g., local health department)	X			XA
Materials	Transport	X
	Accommodations	X
	Food	X	XB
	Curriculum materials	X
	Monitoring equipment	X
	Advertising and promotion	X
	Accreditation and certification	X
	Training materials for personnel	X
	Communication and administration	X

^AThere is a potential overlap in costs (see main text). To avoid double counting with the costs in the education sector, it is important to only count the net costs for each stakeholder, being the value of time investments minus the received financial contributions

^BFood costs are a positive cost to the education sector and a negative cost to the household sector and do not indicate an overlap in costs

^CStakeholders may invest time for the local planning, coordination, training (and substituting teachers during the training of personnel), delivery, and recurrent evaluation. Furthermore, a per child fee may be required to compensate for the time investments of stakeholders. When beneficiaries of unemployment benefits are employed, this may lead to offsets in the household sector and in the social security sector (see main text)