When adolescents face both Internet addiction and mood symptoms: A cross-sectional study of comorbidity and its predictors.

This study aimed to determine the prevalence of comorbid Internet addiction (IA) and mood symptoms and to identify common and unique risk profiles for individual and comorbid mental health problems among adolescents. A total of 2272 high school students in Changchun, China, were included in a cross-sectional study. Participants were asked to complete paper-based questionnaires on sociodemographic characteristics, lifestyle factors, Internet use, parent-child relationships, IA, and mood symptoms. Multivariate logistic regressions were used to compare the risk profiles for IA, mood symptoms, and their comorbidity. The Bonferroni correction was used for multiple tests. Students who were girls, were current smokers, had more than 1.5 h sleep deprivation per day on weekdays, used the Internet for more than 30 and 240 min per day on weekdays and weekends, respectively, used social networking sites more than 6 times per day, were Internet gamers, and/or reported poor parent-child relationships reported higher rates of comorbid IA and mood symptoms. Adolescents exposed to more of these correlates would have a higher risk of IA, mood symptoms, and their comorbidity. Public strategies for the prevention of mental illnesses should expand their capacity to identify and limit the co-occurrence of IA and mood symptoms.