Cited by 1,450Stress Responses and CortisolAdrenal Hormones and DisordersCircadian rhythm and melatonin

Free Cortisol Levels after Awakening: A Reliable Biological Marker for the Assessment of Adrenocortical Activity

Pruessner, J.C., Wolf, O.T., Hellhammer, D.H., Buske-Kirschbaum, A., von Auer, K., Jobst, S., Kaspers, F., Kirschbaum, C.·1997·Life Sciences

Abstract

In three independent studies, free cortisol levels after morning awakening were repeatedly measured in children, adults and elderly subjects (total n=152). Cortisol was assessed by sampling saliva at 10 or 15 minute intervals for 30-60 minutes, beginning at the time of awakening for two days (Study 1 and 2) or one (Study 3) day, respectively. In all three studies, free cortisol levels increased by 50-75% within the first 30 minutes after awakening in both sexes on all days. Premenopausal women consistently showed a stronger increase with a delayed peak after awakening compared to men on all days. In Study 2, there was a tendency for lower early morning free cortisol levels for women taking oral contraceptives (p=.10). Stability of the area under the curve (AUC) of the early morning free cortisol levels over the three (Study 1 and 2) or two (Study 3) days ranged between r=.39 and r=.67 (p<.001). Neither age, weight, nor smoking showed an effect on baseline or peak cortisol levels. Sleep duration, time of awakening and alcohol consumption also appeared to be unrelated to early morning free cortisol levels. From these data we conclude that in contrast to single assessments at fixed times, early morning cortisol levels can be a reliable biological marker for the individual's adrenocortical activity when measured repeatedly with strict reference to the time of awakening.

Integrity signals

Registry

Crossref · 10.1016/s0024-3205(97)01008-4

Cites

22 of 22 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Pruessner, J. C., Wolf, O. T., Hellhammer, D. H., Buske-Kirschbaum, A., von Auer, K., Jobst, S., Kaspers, F., & Kirschbaum, C.
Affiliations
Universität Trier (DE)
Corresponding author
Kirschbaum, C.
Venue
Life Sciences
Publisher
Elsevier BV
Published
1997-11
Volume
61
Issue
26
Pages
2539-2549
ISSN
0024-3205 (ISSN-L)
OpenAlex
W2057881388
Cited by
1,450
References
22
Citations by year
2026: 31 · 2025: 37 · 2024: 42 · 2023: 50 · 2022: 56 · 2021: 71 · 2020: 91 · 2019: 67 · 2018: 63 · 2017: 69 · 2016: 93 · 2015: 73 · 2014: 92 · 2013: 80 · 2012: 72
FWCI
4.02
Type
journal article
Language
en
Open access
closed
Locations
  • Life Sciences (publishedVersion)
  • PubMed (publishedVersion)
  • KOPS (University of Konstanz) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
Keywords
free cortisol, early morning awakening, adrenocortical function, salivary cortisol, biomarkers, sex differences, premenopausal women, oral contraceptives, diurnal cortisol rhythm, measurement reliability
MeSH terms
Adrenal Cortex, Adult, Aged, Aging, Child, Circadian Rhythm, Contraceptives, Oral, Female, Humans, Hydrocortisone, Kinetics, Male, Saliva, Sleep, Smoking, Wakefulness, Biomarkers, Premenopause

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review