Table 2.

Constructs, items, and references.

Constructs	Items	References
Self-Efficacy	SE1. I know what kind of health-related information is provided on this m-health app. SE2. I have the competence to assess the correctness of the health-related information provided on this m-health app. SE3. I can use this m-health app to make health-related decisions.	[18]
Perceived Vulnerability	PV1. I think I am facing the threat of serious disease. PV2. I think I am facing the probability of suffering from a serious disease in the future. PV3. I will probably suffer from a disease.
Response Efficacy	RE1. This m-health app can notify users of the starting and ending time of healthcare services in time. RE2. This m-health app can send in-time feedback to me. RE3. This m-health app can provide instructions if I have some problems.
Direct Network Externalities	DNE1. Most of my friends use this m-health app. DNE2. The majority of my colleagues use this m-health app. DNE3. The majority of the people I know use this m-health app.	[20]
Indirect Network Externalities	INE1. This m-health app provides many complementary services (e.g., health management tools and discussion groups). INE2. This m-health app provides many other application services. INE3. This m-health app provides some value-added services (online shopping, outfits, skincare, weight reduction and body shaping, medical cosmetology, etc.)
Attitude	ATTI1. Using this m-health app is a good idea. ATTI2. Using this m-health app makes seeing a doctor easier and more enjoyable. ATTI3. I like to use this m-health app.	[53]
Continued Intention	CI1. I intend to continue using this m-health app in the future. CI2. I will continue to use this m-health app. CI3. I will recommend this m-health app to others.