Further support for higher salivary cortisol levels in "morning" compared to "evening" persons.
Identifieur interne : 001407 ( Main/Merge ); précédent : 001406; suivant : 001408Further support for higher salivary cortisol levels in "morning" compared to "evening" persons.
Auteurs : Brigitte M. Kudielka [Allemagne] ; Silja Bellingrath ; Dirk H. HellhammerSource :
- Journal of psychosomatic research [ 0022-3999 ] ; 2007.
English descriptors
- KwdEn :
- MESH :
- chemical , blood : Hydrocortisone.
- metabolism : Saliva.
- physiology : Circadian Rhythm, Wakefulness.
- Adult, Age Factors, Aged, Female, Humans, Individuality, Male, Middle Aged, Sex Factors.
Abstract
We analyzed free cortisol daytime levels in a "3-days-7-samples-a-day" protocol in relation to morningness in 112 middle-aged male and female adults derived from the first year of data of the Trier Teacher Stress Study using a one-item proxy for the assessment of chronotype. First, log-transformed cortisol levels were analyzed by a repeated-measures approach controlling for relevant covariates. Results yielded an almost significant main effect of morningness (P=.06). Subsequent within-day analyses, additionally controlling for awakening time, resulted in (marginally) significant main effects of morningness at Day 1 (P=.06) and Day 3 (P=.05) and a significant interaction of sample-by-morningness at Day 2 (P=.04). In sum, the present data seem to corroborate the idea of higher daytime cortisol levels in morning relative to evening types in a sample of healthy middle-aged male and female adults.
DOI: 10.1016/j.jpsychores.2007.03.016
PubMed: 17467415
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<orgName type="university">Université de Trèves</orgName>
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<term>Hydrocortisone (blood)</term>
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<term>Middle Aged</term>
<term>Saliva (metabolism)</term>
<term>Sex Factors</term>
<term>Wakefulness (physiology)</term>
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<term>Age Factors</term>
<term>Aged</term>
<term>Female</term>
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<front><div type="abstract" xml:lang="en">We analyzed free cortisol daytime levels in a "3-days-7-samples-a-day" protocol in relation to morningness in 112 middle-aged male and female adults derived from the first year of data of the Trier Teacher Stress Study using a one-item proxy for the assessment of chronotype. First, log-transformed cortisol levels were analyzed by a repeated-measures approach controlling for relevant covariates. Results yielded an almost significant main effect of morningness (P=.06). Subsequent within-day analyses, additionally controlling for awakening time, resulted in (marginally) significant main effects of morningness at Day 1 (P=.06) and Day 3 (P=.05) and a significant interaction of sample-by-morningness at Day 2 (P=.04). In sum, the present data seem to corroborate the idea of higher daytime cortisol levels in morning relative to evening types in a sample of healthy middle-aged male and female adults.</div>
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