Objective: To determine the prevalence of Facebook (FB) addiction and its related factors among Thai high school students.
Material and Method: This cross-sectional study was performed among 972 high school students in four provinces
associated with high economic prosperity in Thailand: Bangkok, Ubon Ratchathani, Chiang Mai and Songkhla, utilizing a
multistage cluster sampling technique. A self-administrative questionnaire was produced composing of three parts; demographic data, a Thai version of the Bergen Facebook Addiction Scale (Thai-BFAS) and the Thai version of the General Health Questionnaire-28 items. Multivariate analysis was employed to analyze the factors associated with FB addiction.
Results: The prevalence of FB addiction amongst Thai adolescents was 41.8% (95% CI; 38.6, 45.2). Related factors included gender, school location, sufficiency of personal finance, devices of FB access, duration of staying online via FB, and FB usage during holidays. In addition, every 1-hour increase in usage enhanced the risk for FB addiction (OR = 1.12, 95% CI; 1.05, 1.19).
Conclusion: The prevalence of FB addiction in Thai high school students was found to be higher than in many other countries. Related factors should be controlled in order to reduce FB addiction and its detrimental impacts, such as behavior
modification and the promotion of healthier free-time activities. Further studies are recommended to understand why FB addiction is so high in Thailand.

Keywords: Facebook addiction, High school students