Journal of Clinical Hepatology
Chronic liver disease affects more than the liver and is frequently accompanied by sleep problems and depression. Researchers examined whether night-time sleep duration might partly explain the association between liver disease and depressive symptoms.
The study used two large population datasets: 14,225 participants from the China Health and Retirement Longitudinal Study and 11,353 from the US National Health and Nutrition Examination Survey.
After accounting for demographic, social and behavioural factors, chronic liver disease was associated with 76% higher odds of depression in the Chinese dataset and 87% higher odds in the US dataset.
Night-time sleep duration explained part, but not most, of this relationship. The estimated mediated proportion was 12.41% in the Chinese population and 2.16% in the US population.
The association with depression differed among liver disease subtypes. It was statistically significant for autoimmune hepatitis, cirrhosis and fatty liver disease, but not for viral hepatitis or the combined group of other liver diseases.
Social differences were also observed. The association was stronger among people with agricultural household registration in China and among a middle-income category relative to the poverty threshold in the United States.
Depression can reduce quality of life, treatment adherence and long-term health in people with chronic liver disease. The findings suggest that routine liver care should consider emotional wellbeing and sleep rather than focusing exclusively on biochemical and imaging results. Sleep duration represents a potentially modifiable factor, but the relatively small mediated proportions—particularly in the US dataset—show that it explains only a limited part of the association. Improving sleep should therefore complement, not replace, appropriate mental-health assessment and treatment.
Because the analysis was cross-sectional, it cannot determine whether liver disease altered sleep and mood, whether depression disrupted sleep and health behaviours, or whether other factors caused all three. The liver-disease definitions and depression measures also differed between datasets.
Objective: To investigate the association between chronic liver disease (CLD) and depression and the mediating role of nocturnal sleep…
