Table 1.

Identifying potential spillovers of health interventions; illustrative examples

Intervention	Type	User	Potential spillovers
		Who?	Who?	Which?
Pharmaceutical	Drug or vaccine	Patient	Caregivers, family, others (e.g., other relatives, employer, society)	Health-related quality of life, well-being, informal care time costs, productivity costs, environmental costs
Psychological therapy	Group therapy sessions	Patient and family	Others (e.g., other relatives, employer, society)	Health-related quality of life, education sector costs, criminal justice costs
Physical therapy	Individual therapy sessions	Patient	Caregivers, family, others (e.g., other relatives, employer, society)	Health-related quality of life, care-related quality of life, productivity costs
	Group training sessions	Informal caregivers	Patient, family, others (e.g., other relatives, employer, society)	Health-related quality of life, well-being, productivity costs