Table 5.

Definition, frameworks and commonly measured constructs in systematic reviews on scalability of healthcare interventions (n = 11)

Frameworks (used in N = 4 reviews)	N (%)
• WHO/ExpandNet. Scaling-up framework Scaling up consists of five elements: the innovation, resource team, user organisation, broader environment and the scaling strategy	1 (25)
• Milat et al., (2020) [82]. Intervention scalability assessment tool (ISAT) Assessment of scalability includes five domains: the problem, the intervention, strategic/political context, evidence of effectiveness, intervention costs and benefits, fidelity and adaptation, reach and acceptability, delivery setting and workforce, implementation infrastructure and sustainability.	1 (25)
• Bradley et al., (2012) [83]. The AIDED model Scalability consists of five interrelated components: the landscape, innovation to fit user receptivity, support, engagement of user groups and effort for spreading innovation.	1 (25)
• Greenhalgh et al., (2017) [84]. NASSS Framework	1 (25)
Commonly measured components
• Adaptation	2 (18)
• Resources	4 (36)
• Partnerships/collaborations	1 (9)
• Organisation/community/sociocultural factors	5 (45)
• Cost-benefit/economic feasibility	2 (18)