A new study in the journal Psychological Medicine has found a direct association between loneliness and trouble sleeping in young adults.

Before this study, 2,232 eighteen- and nineteen-year-old British young adults had previously given responses on sleep and on loneliness as part of the Environmental Risk Longitudinal Twin Study, and researchers have now analyzed that data in a new way. As Medical News Today reports, "lonely participants [in the study] were 10 percent more likely to have poor sleep quality than subjects who did not report loneliness, and they were 24 percent more likely to experience daytime tiredness and problems with concentration."

Researchers theorized to Medical News Today that the link they found might be related to higher cortisol levels in lonely young adults, and it was strongest among those who had previously been exposed to violence, perhaps due to difficulty in feeling safe when alone and trying to sleep.

To read the full article, please visit the Medical News Today website.