Sleep disorders precede and increase the risk of sepsis-associated delirium, with melatonin dysregulation mediating this relationship
In a prospective cohort of 99 ICU patients with sepsis, sleep disorders preceded SAD onset with a duration-dependent effect and were associated with a 1.45-7.69-fold higher risk of delirium across multiple analyses. Lower melatonin concentrations correlated with worse multidimensional sleep impairment, and mediation analysis showed that melatonin reduction occurring alongside sleep disturbances was associated with SAD development (ACME = -0.110, P = 0.024).
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Sleep disorders precede and increase the risk of sepsis-associated delirium, with melatonin dysregulation mediating this relationship The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Sleep disorders precede and increase the risk of sepsis-associated delirium, with melatonin dysregulation mediating this relationship
This conclusion is most relevant to: 99 ICU patients with sepsis.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Association Among Melatonin Dysregulation, Sleep Disorders, and Sepsis-Associated Delirium: A Prospective Cohort Study with Mediation Analysis. (Neurocritical care, 2026) —
How It Works
The proposed biological pathway:
- ▸Sepsis induces sleep disturbances and melatonin dysregulation
- ▸Lower melatonin concentrations impair sleep continuity and overall sleep quality
- ▸Sleep disorders precede SAD onset with duration-dependent effect
- ▸Melatonin reduction mediates the link between sleep disruption and SAD development
Who Might Benefit
Evidence fit by population:
- ▸99 ICU patients with sepsis
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Observational design cannot establish causality
- ▸Potential influence of unmeasured confounders (e.g., sedation, critical illness severity) not fully excluded
- ▸Small sample size (n=99) limits generalizability
Frequently Asked Questions
What is the relationship between sleep disorders and sepsis-associated delirium?▼
Sleep disorders precede SAD onset with a duration-dependent effect and are associated with a 1.45- to 7.69-fold higher risk of delirium.
How does melatonin dysregulation contribute to SAD?▼
Lower melatonin concentrations correlate with worse sleep quality and continuity, and melatonin reduction at the onset of sleep disturbances mediates the development of SAD.
Was the effect of sedation controlled for in this study?▼
Yes, the biphasic melatonin suppression in SAD patients was independent of sedation exposure (P > 0.05).
What statistical methods were used to adjust for confounding?▼
Multivariable logistic analysis, propensity score matching, inverse probability weighting, mixed-effects models, Bayesian analysis, and mediation analysis were used.
References
- 1.Zhao L, Cui Q, Dong S, Yan Q, Yang F, Shi H, Wang Y, Liu J, Li Y. “Association Among Melatonin Dysregulation, Sleep Disorders, and Sepsis-Associated Delirium: A Prospective Cohort Study with Mediation Analysis..” Neurocritical care, 2026. PMID: 42469580 DOI: 10.1007/s12028-026-02594-0