According to Reuters, chronic short sleep is tied to greater depression in young women.
“The overall message that poor quality and insufficient sleep lead to poor mood, which, in turn, worsens sleep was not surprising,” said lead author David A. Kalmbach of the University of Michigan Medical School in Ann Arbor.
More noteworthy, he added, was that these relationships were evident in healthy, young women, not just insomniacs or depressed people.
The researchers studied 171 female college students for two weeks, beginning with an in-person questionnaire assessment of anxiety and depression levels and continuing with daily self-reported measures of mood and anxiety. The women also reported their total sleep time, time to fall asleep, and ratings of sleep quality each night.