Table 1.

Analysis coding scheme for systematic review.

S/N	Characteristics	Description/example
1	Authors	Name of authors
2	Study date	Month and year study was carried out
3	Type of application	Description based, prototype
4	Target audience	Country, sample size, age
5	Type of study	Quantitative, qualitative, mixed
6	Outcome variable	Intention to download app, intention to install app, intention to use app, etc.
7	Facilitators	Perceived usefulness, perceived trust, etc.
8	Barriers	Privacy concern, perceived risk, etc.
9	Moderating variables	Socio-demographic variables such as Age, gender, culture, etc.
10	Findings/Takeaways	Summary of the main findings and takeaways
11	Recommendations	Proposed guidelines for effective design of CTAs