efficacystä
Efficacystä is a neologism used in discussions of medicine, policy, and technology to describe the alignment between the efficacy of an intervention and its real-world effectiveness. Efficacy refers to performance under controlled conditions, while efficacystä emphasizes how well those results translate when interventions are deployed in routine settings with diverse users and limited resources. The term is used to critique traditional efficacy assessments and to foreground factors such as feasibility, context, and sustainability in decision-making.
Origin and usage: The term appears in contemporary discourse as a critical supplement to efficacy and effectiveness,
Framework and measurement: Proponents outline a framework that combines efficacy data with implementation outcomes, including reach,
Criticism and reception: Critics argue that efficacystä can be ambiguous or redundant with existing concepts such
See also: efficacy, effectiveness, external validity, implementation science, real-world evidence.