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The Coronavirus disease (COVID-19) spread rapidly in China in beginning of 2020. Self-quarantine was suggested by Chinese government to block the spread of the COVID-19. During the self-quarantine, the media played an indispensable role in acquisition of information about the disease. And it could also impact on people's mental health. Therefore, it is necessary to study the psychological outcome resulted from media use during the outbreak of COVID-19. The data in this article could help researchers to explore the mechanism between media use and mental health, and to have a deeper comprehension of the impact of media use on mental health during a public health emergency. The dataset provided in this article included 917 participants recruited from different provinces all over China. Among the participants, there were 304 males and 613 females, with an average age of 28.6 and a standard deviation of 9.5. They took Media Use Questionnaire (MUQ), Empathy-Sympathy Questionnaire (ESQ), Positive and Negative Affect Scale (PANAS), Death Anxiety Questionnaire (DAQ), Meaning in Life Questionnaire (MLQ), State boredom Questionnaire (SBQ), and Depression Anxiety Stress Scale-21 (DASS-21) to assess their media use and mental health during the outbreak of COVID-19. All these instruments for data collection were Chinese versions. In addition, a .csv file consists of major variables we used are included as a supplementary material. Descriptive statistics and hierarchical regression had been conducted with these data. For a discussion of the findings based on the dataset please see the article: Media use and acute psychological outcomes during COVID-19 outbreak in China [1] and Psychological distress and state boredom during the COVID-19 outbreak in China: the role of meaning in life and media use [2] .

Objective During the lockdown of cities and home quarantine, media became the only way for people to conveniently get coronavirus disease-2019 (COVID-19)-related information. And media engagement was closely related to psychological outcomes. But fewer researchers took COVID-19-related posting behaviors into consideration. Therefore, the present study aimed at examining the differences in psychological outcomes between people who posted COVID-19-related content on social media and those who did not.Methods The present study included 917 participants (304 males, 613 females) who had answered the questionnaires of media engagement, positive affect, negative affect, depression, anxiety, stress, satisfaction with life, death anxiety, and meaning in life.Results Results of t-tests showed that the Post group had lower levels of negative affect, anxiety, stress, and death anxiety than the Not Post (Npost) group. Network comparison tests indicated that the Npost group’s network and the Post group’s network differed in global strength, two edge-weights, and node centrality indices.Conclusion The results indicated that more attention should be paid to people who did not post any COVID-19-related content, especially when they have higher levels of stress and depression to prevent comorbidities. And for people who posted content, more attention should be paid when they have a higher level of negative affect.