Table 1.

Measurement instrument.

Constructs	Items
Performance expectancy (PE) [8,21]	1. I would find the physician–patient interaction in an online health community useful for my health. 2. Conducting an interaction with physicians in an online health community can improve my life quality. 3. Conducting an interaction with physicians in an online health community increases my ability for self-care. 4. Conducting an interaction with physicians in an online health community makes me become healthier.
Effort expectancy (EE) [8,21]	1. Physician–patient interaction in an online health community would be clear and understandable. 2. It would be easy for me to become skillful at physician–patient interaction in an online health community. 3. I would find the physician–patient interaction in an online health community easy to maintain. 4. Learning to conduct the physician–patient interaction in an online health community is easy for me.
Social influence (SI) [8,21]	1. People who influence my behavior think that I should conduct an interaction with physicians in ab online health community. 2. People who are important to me think that I should conduct an interaction with physicians in an online health community. 3. I will feel uneasy if my friends conduct an interaction with physicians in an online health community but I do not.
Attitude toward using technology (AUT) [8,21]	1. Physician–patient interaction in an online health community is a bad/good thing. 2. Physician–patient interaction in an online health community makes healthcare more easily to understand. 3. Physician–patient interaction in an online health community is useful. 4. I like to conduct interactions with physicians in an online health community.
Usage behavior (UB) [8,21]	1. Recently, I plan to conduct an interaction with physicians in ab online health community. 2. I’m willing to conduct an interaction with physicians in ab online health community if available. 3. I think I will be willing to conduct an interaction with physicians in an online health community if I have known some. 4. I will conduct an interaction with physicians in an online health community in the future.