Investigating the effect of social networking site use on mental health in an 18-34 year-old general population; a cross-sectional study using the 2016 Scania Public Health Survey.

Women, but not men, with frequent SNS use and a high number of SNS contacts were more likely to have poor mental health, which was exacerbated in women with low PES. Facilitating PES could be an approach for improving mental health among young adults. Future studies on the use of SNS should focus more on gender analyses.