The Claim
Healthcare shift workers exhibit a flattened cortisol awakening response and elevated evening cortisol levels, which are associated with significantly poorer sleep quality as measured by the Pittsburgh Sleep Quality Index and actigraphy, indicating that circadian misalignment disrupts the normal diurnal cortisol rhythm and contributes to sleep disturbances in this population.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
People who work night shifts or irregular hours tend to have weird cortisol patterns—low in the morning and high at night—which seems to make their sleep worse. This might be because their body’s internal clock is out of sync with their work schedule.
See the scientific wording
Healthcare shift workers exhibit a flattened cortisol awakening response and elevated evening cortisol levels, which are associated with significantly poorer sleep quality, as measured by the Pittsburgh Sleep Quality Index and actigraphy, suggesting circadian misalignment disrupts the normal diurnal cortisol rhythm and contributes to sleep disturbances in this population.
What the research says
1 studyShift workers’ bodies have trouble keeping their stress hormone (cortisol) in sync with day and night, leading to low levels in the morning and high levels at night — this messes up their sleep. The study found this pattern is common in healthcare workers and linked to worse sleep.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.