Optimism and self-esteem are related to sleep. Results from a large community-based sample.
BACKGROUND
There is evidence that positive personality characteristics, such as optimism and self-esteem, are important for health. Less is known about possible determinants of positive personality characteristics.


OBJECTIVE
To test the relationship of optimism and self-esteem with insomnia symptoms and sleep duration.


METHODS
Sleep parameters, optimism, and self-esteem were assessed by self-report in a community-based sample of 1,805 adults aged between 30 and 84 years in the USA. Moderation of the relation between sleep and positive characteristics by gender and age as well as potential confounding of the association by depressive disorder was tested.


RESULTS
Individuals with insomnia symptoms scored lower on optimism and self-esteem largely independent of age and sex, controlling for symptoms of depression and sleep duration. Short sleep duration (<6 h) was related to lower optimism and self-esteem when compared to individuals sleeping 7-8 h, controlling depressive symptoms. Long sleep duration (>9 h) was also related to low optimism and self-esteem independent of age and sex.


CONCLUSIONS
Good and sufficient sleep is associated with positive personality characteristics. This relationship is independent of the association between poor sleep and depression.
Department of Psychology, University of Basel, Missionsstrasse 62a, 4055, Basel, Switzerland, sakari.lemola@unibas.ch.
Sakari
S
Lemola
Katri
K
Räikkönen
Veronica
V
Gomez
Mathias
M
Allemand
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D055812:Community-Based Participatory Research; D003863:Depression / Q000517:prevention & control* / Q000523:psychology; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008875:Middle Aged; D010549:Personal Satisfaction; D012649:Self Concept; D012890:Sleep; D007319:Sleep Initiation and Maintenance Disorders / Q000523:psychology; D012944:Social Support; D014481:United States; D016387:Women's Health