Table 1.

Population, Intervention, Comparator, Outcome, and Study Design framework for the data collection of digital health app (DHA) System Usability Scale (SUS) scores.

Frame	Inclusion criterion	Exclusion criterion
Population	Members of the general population—globally	Developers or designers of DHA that conducted SUS on their own product
Intervention	DHA	Not a DHA and research papers published before 2011
Comparator	N/Aa	N/A
Outcome	SUS score or mean SUS score for DHA	SUS score not conducted by end users
Study design	The data set of SUS scores for measuring the usability of DHAs was collected using 5 search engines: ACM Digital Library, IEEE Xplore, CORE, PubMed, and Google Scholar. The keywords and queries used in the search included: “health app SUS,” “mhealth SUS,” “digital health apps SUS,” “mobile health SUS,” “mhealth apps usability,” and “mental health apps SUS.”	N/A

^aN/A: not applicable.