In digital globalization, smartphones have played a significant role in daily life. The benefits of smartphone use included contacting a person, sending and receiving messages, getting news information, and accessing social media rapidly [1]. In Thailand, the number of smartphone users increased from 14.4 to 21.8 million people from 2013 to 2017, and the number of users is expected to gradually increase to 27.5 million people in 2021 [2]. According to the Pew Research Center, adults aged 18-34 years or millennials owned smartphones and used the Internet more than those over 35 years old in many countries [3]. At the same time, the prevalence