FAIRFAX, Va., Sept. 21 -- George Mason University issued the following news release:

College students who spend more time on social media tend to sleep worse, and that may have consequences for how they perceive their own health, according to a new George Mason University study.

The study, published in Public Health Reports, found that greater social media use at the start of the school year predicted poorer sleep quality six months later, which in turn predicted worse self-rated health six months after that. According to the researchers, it's the first study to indicate that poor sleep quality may be a pathway connecting social media use with self-rated health.

"These findings suggest that students' social media habits early may have ef...