Cited by 905Stress Responses and CortisolAdrenal Hormones and DisordersCircadian rhythm and melatonin

Diurnal cortisol slopes and mental and physical health outcomes: a systematic review and meta-analysis

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Adam, Emma K., Quinn, Meghan E., Tavernier, Royette, McQuillan, Mollie T., Dahlke, Katie A., Gilbert, Kirsten E.·2017·Psychoneuroendocrinology

Abstract

Changes in levels of the stress-sensitive hormone cortisol from morning to evening are referred to as diurnal cortisol slopes. Flatter diurnal cortisol slopes have been proposed as a mediator between chronic psychosocial stress and poor mental and physical health outcomes in past theory and research. Surprisingly, neither a systematic nor a meta-analytic review of associations between diurnal cortisol slopes and health has been conducted to date, despite extensive literature on the topic. The current systematic review and meta-analysis examined associations between diurnal cortisol slopes and physical and mental health outcomes. Analyses were based on 179 associations from 80 studies for the time period up to January 31, 2015. Results indicated a significant association between flatter diurnal cortisol slopes and poorer health across all studies (average effect size, r=0.147). Further, flatter diurnal cortisol slopes were associated with poorer health in 10 out of 12 subtypes of emotional and physical health outcomes examined. Among these subtypes, the effect size was largest for immune/inflammation outcomes (r=0.288). Potential moderators of the associations between diurnal cortisol slopes and health outcomes were examined, including type of slope measure and study quality indices. The possible roles of flatter slopes as either a marker or a mechanism for disease etiology are discussed. We argue that flatter diurnal cortisol slopes may both reflect and contribute to stress-related dysregulation of central and peripheral circadian mechanisms, with corresponding downstream effects on multiple aspects of biology, behavior, and health.

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Crossref · 10.1016/j.psyneuen.2017.05.018

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  • Cortisol regulation plays a key mediating role in the relationship between stress exposure and later negative health outcomes.

    “suggesting cortisol regulation plays a key mediating role in the relationship between stress exposure and later negative health outcomes (Adam et al., 2017; Chrousos and Gold, 1992; O ' Connor et al., 2021).”

    From Effectiveness of stress management interventions to change cortisol levels: a systematic review and meta-analysis. (2024) · cites this paper as Adam et al., 2017

    The Introduction (1.1 Overview) says researchers have suggested that stress-related alterations in cortisol regulation may mediate associations between stress exposure and later health outcomes. This supports a possible mediating role, but not the stronger characterization of cortisol regulation as a key mediator. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • The methods of cortisol collection are likely to impact study findings of intervention effectiveness.

    “Determining the quality of the cortisol measurements in the included studies was imperative to consider because the methods of cortisol collection are likely to impact study findings of intervention effective­ ness (Adam et al., 2017).”

    From Effectiveness of stress management interventions to change cortisol levels: a systematic review and meta-analysis. (2024) · cites this paper as Adam et al., 2017

    The Results (section 3.4; page unavailable) report that objective monitoring of cortisol sample timing was associated with significantly different effect sizes, supporting the importance of collection methods. But the paper examines associations between diurnal cortisol slopes and health outcomes, not findings of intervention effectiveness. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Chronic stress exposure is a major contributor to diurnal cortisol slope flattening.

    “exposure to chronic stress is a major contributor that leads to slope flattening”

    From Strong Enough to Suffer: Emotional Suppression, Stress Exposure, and Physiological Health Among Men Across the Life Course (2026) · cites this paper as Adam et al., 2017

    The Introduction (§1.2; page unavailable) says adverse experience is associated with flatter diurnal cortisol slopes, and the Abstract describes flatter slopes as a proposed mediator of chronic psychosocial stress. The paper does not establish that chronic stress is a major cause of flattening: Discussion §4.4 calls for research to test whether reducing stress reverses it. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Flatter diurnal cortisol slopes predict higher mortality risk, adverse cardiovascular outcomes, and higher levels of mental health symptoms.

    “In a meta-analysis of diurnal cortisol slope and mental and physical health outcomes in 72 studies, Adam et al. (2017) found that flatter slopes in the morning were predictors of a higher mortality risk, adverse cardiovascular outcomes, and higher levels of mental health symptoms.”

    From Strong Enough to Suffer: Emotional Suppression, Stress Exposure, and Physiological Health Among Men Across the Life Course (2026) · cites this paper as Adam et al., 2017

    The Results (§3.3) report that flatter diurnal cortisol slopes predicted higher mortality risk, and the Discussion (§4.1) identifies significant associations with several mental-health outcomes. But cardiovascular outcomes were not significantly associated in the random-effects analysis (§3.3; §4.2), so the sentence overstates that finding. The Abstract reports 80 studies, not 72, and describes slopes across the day rather than specifically in the morning. (LLM, conf=0.91)

    Experimental — accuracy not yet measured
  • Loneliness affects youth's diurnal cortisol, potentially causing chronic increases in cortisol in young adulthood, leading to higher risks of depression, anxiety, inflammation, and other adverse health outcomes.

    “Loneliness affects youth’s diurnal cortisol, a key stress hormone [83, 84], potentially causing chronic increases in cortisol in young adulthood, leading to higher risks of depression, anxiety, inflammation, and other adverse health outcomes [85–87].”

    From The prospective association of adolescent loneliness and low resilience with anxiety and depression in young adulthood: The HUNT study (2025) · cites this paper as [83]

    The Discussion (§4.1; page unavailable) reports that flatter diurnal cortisol slopes are associated with depression, immune/inflammatory outcomes, and other poorer health outcomes. The Results (§3.3; page unavailable) find no significant association with anxiety and note a trend in the opposite direction. The paper does not establish that loneliness in youth causes chronically elevated cortisol in young adulthood or that such an increase leads to those outcomes. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 1

  1. Otsuka K Cornelissen G Halberg F 2016 From Chronobiology to Chronomedicine: Early Days, Chronomics and Continuous Ambulatory Blood Pressure Monitoring: Vascular Chronomics: From 7-Day/24-Hour to Lifelong Monitoring Springer Japan, Tokyo 1 51

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Authors
Adam, E. K., Quinn, M. E., Tavernier, R., McQuillan, M. T., Dahlke, K. A., & Gilbert, K. E.
Affiliations
  • Northwestern University (US)
  • Wesleyan University (US)
  • American Institutes for Research (US)
  • Washington University in St. Louis (US)
Corresponding author
Adam, Emma K.
Venue
Psychoneuroendocrinology
Publisher
Elsevier BV
Published
2017-09
Volume
83
Pages
25-41
ISSN
0306-4530 (ISSN-L)
OpenAlex
W2618888428
Cited by
905
References
161
Citations by year
2026: 113 · 2025: 115 · 2024: 104 · 2023: 100 · 2022: 133 · 2021: 112 · 2020: 128 · 2019: 59 · 2018: 38 · 2017: 2
FWCI
5.47
Type
journal article
Language
en
Open access
Locations
  • Psychoneuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Alcohol Abuse and Alcoholism (R21AA021073)
  • National Institute of Mental Health (T32MH100019)
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
diurnal cortisol slope, cortisol, psychosocial stress, mental health, physical health, immune function, inflammation, circadian rhythm, health outcomes
MeSH terms
Circadian Rhythm, Emotions, Female, Humans, Hydrocortisone, Hypothalamo-Hypophyseal System, Male, Mental Health, Pituitary-Adrenal System, Saliva, Stress, Psychological

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