80% of adults have nightmares at least once a year , and 5% have them more than once a month. But it is people who stay up late at night who are most at risk of having dreams that cause anxiety or terror, as Yavuz Selvi and his colleagues at Yil University in Turkey have shown. On a scale from 0 to 4 in the number of nightmares (never and every night, respectively), people who go to bed quite late obtain an average score of 2.10 , while early risers rank well below it. scale, around 1.23 . Details of the study have been published in the journal Sleep and Biological Rhythms.
Although the causes of this relationship are not yet known, researchers find a possible explanation in previous studies that show how late-night people tend to have a more stressful lifestyle .
