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. 2020 Sep 4;22(9):e18080. doi: 10.2196/18080

Table 1.

Description of the included factors with an example statement and literature references.

Factor (number of statements) Operational definition Example of a statement References
Perceived usefulness (3) The extent to which a person believes that using the medical app will improve his or her quality of life Using medical apps for remote health care would make my life easier. [24,29,32,34]
Perceived ease of use (4) The extent to which a person believes that using medical apps will be free of effort It is easy to use medical apps for remote health care. [24,25,29,32,34]
Attitude toward use (4) An individual’s positive or negative feelings or appraisal about using medical apps Using medical apps for remote care would be a good idea. [24,29,32,34,41-43]
Subjective norm (3) The person’s perception that most people who are important to them think they should or should not use medical apps People who are important to me think that I should use medical apps. [24,25,29,41-43]
Sense of control (2) The perceptions of internal and external constraints on using medical apps Using medical apps for remote health care is entirely within my control. [29,42-44]
Feelings of anxiety (2) An individual’s apprehension when he or she is faced with the possibility of using technology I feel anxious to start using medical apps for remote health care. [29,32]
Personal innovativeness (4) Personal tendency to innovate, or introduce something new or different In general, I do not hesitate to try out new information technology. [20]
Social relationships (3) An individual’s satisfaction with personal relationships and support from friends and family I am satisfied with my personal relationships. [32,45,46]
Self-perceived effectiveness (2) Judgment of one’s ability to use medical apps to accomplish a particular job or task I could perform a task on a medical app if I have just the instruction manual for assistance. [29,32]
Service availability (3) The obtainability and accessibility of medical apps Medical apps for remote health care are always available whenever I need them. [47]
Facilities (2) Objective factors in the environment that can make technology usage easy. Included indicators are basic knowledge and available help I have the knowledge needed to use medical apps.

[28,29,32]
Finance (1) Having the financial resources to make technology usage easy My financial situation stops me from using medical apps. [28,29,32]