Internet use has global influences on all aspects of life and has become a growing concern. Cross-sectional studies on Internet addiction (IA) have been reported but causality is often unclear. More longitudinal studies are warranted.
We investigated incidence and predictors of IA conversion among secondary school students. A 12-month longitudinal study was conducted among Hong Kong Chinese Secondary 1–4 students (N = 8286). Using the 26-item Chen Internet Addiction Scale (CIAS; cut-off >63), non-IA cases were identified at baseline. Conversion to IA during the follow-up period was detected, with incidence and predictors derived using multi-level models.
Prevalence of IA was 16.0% at baseline and incidence of IA was 11.81 per 100 person-years (13.74 for males and 9.78 for females). Risk background factors were male sex, higher school forms, and living with only one parent, while protective background factors were having a mother/father with university education. Adjusted for all background factors, higher baseline CIAS score (ORa = 1.07), longer hours spent online for entertainment and social communication (ORa = 1.92 and 1.63 respectively), and Health Belief Model (HBM) constructs (except perceived severity of IA and perceived self-efficacy to reduce use) were significant predictors of conversion to IA (ORa = 1.07–1.45).
Prevalence and incidence of IA conversion were high and need attention. Interventions should take into account risk predictors identified, such as those of the HBM, and time management skills should be enhanced. Screening is warranted to identify those at high risk (e.g. high CIAS score) and provide them with primary and secondary interventions.
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We would like to express our sincere gratitude to the secondary schools that participated in this study by facilitating us in recruiting participants. Thanks are extended to all participants who took part in the study, and other fieldworkers who helped in the entire data collection period. This project was supported by Award Number 09100591 from Health and Medical Research Fund (HMRF) in Hong Kong. HMRF had no role in the study design, collection, analysis or interpretation of the data, writing of the manuscript, or the decision to submit the paper for publication.
Conflict of interest
The authors declare that they have no conflict of interest.
Ethical standards statement
The manuscript does not contain clinical studies or patient data. Each participant gave informed consent prior to their inclusion in the study. Ethics approval was obtained from the Survey and Behavioral Ethics Committee, the Chinese University of Hong Kong.
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Lau, J.T.F., Gross, D.L., Wu, A.M.S. et al. Incidence and predictive factors of Internet addiction among Chinese secondary school students in Hong Kong: a longitudinal study. Soc Psychiatry Psychiatr Epidemiol 52, 657–667 (2017). https://doi.org/10.1007/s00127-017-1356-2
- Internet addiction
- Health belief model