Decrease in Sleep Duration and Poor Sleep Quality over Time Is Associated with an Increased Risk of Incident...

Area of Science:

• Hepatology
• Sleep Medicine
• Epidemiology

Background:

• The relationship between changes in sleep patterns and the development of non-alcoholic fatty liver disease (NAFLD) remains unclear.
• Understanding this association is crucial for public health initiatives and preventative strategies.

Purpose of the Study:

• To investigate the impact of longitudinal changes in sleep duration and quality on the incidence of NAFLD.
• To assess the risk of developing hepatic steatosis (HS) and liver fibrosis based on sleep pattern alterations.

Main Methods:

• A large cohort study of 86,530 Korean adults without baseline NAFLD was conducted with a median follow-up of 3.6 years.
• Sleep duration and quality were evaluated using the Pittsburgh Sleep Quality Index (PSQI).
• Hepatic steatosis (HS) and liver fibrosis were assessed via ultrasonography and the FIB-4 index, with Cox proportional hazard models used for analysis.

Main Results:

• A decrease in sleep duration of over 1 hour was associated with a 24% increased risk of incident HS (HR: 1.24, 95% CI: 1.15-1.35).
• Persistently poor sleep quality showed a 13% increased risk of incident HS (HR: 1.13, 95% CI: 1.05-1.20).
• Significant associations were also observed for incident HS combined with intermediate/high fibrosis (FIB-4).

Conclusions:

• Changes in sleep duration and quality over time are significantly associated with an increased risk of incident NAFLD.
• These findings highlight the potential importance of maintaining adequate sleep duration and quality for NAFLD prevention.
• Sleep health should be considered a modifiable factor in strategies aimed at reducing the burden of liver disease.