Insomnia lasts for years: study
Many people who develop insomnia may find symptoms persist for several years, a recent Canadian study suggests.
Researchers followed 3073 middle-aged adults (mean age 48.1 years) over five years, assessing sleep at baseline and during annual checkups.
At baseline, 1717 participants (55.8%) were good sleepers; 818 people (26.6%) had subsyndromal insomnia; and 538 (17.5%) had insomnia syndrome.
Among participants who were good sleepers at baseline, 13.9% developed insomnia during the study.
In addition, 37.5% of