Depression and daytime dysfunction centralize the fatigue-sleep cascade in island firefighters: a symptom network and Bayesian DAG study.

ABSTRACT:

Background

Sleep disturbances, fatigue, and psychological distress are prevalent among island-based firefighters, a high-risk occupational group. However, the interactions and mechanisms underlying these factors remain unclear. This study investigated relationships among fatigue, sleep disturbances, psychological distress, and psychological resilience using symptom network analysis and exploratory Bayesian Directed Acyclic Graph (DAG) modeling.

Methods

We surveyed 570 male island-based firefighters in China (cross-sectional). The PSQI, FSS, SCL-90, and CD-RISC were administered. Variables were residualized for demographic/behavioral covariates and z-standardized. We estimated an EBICglasso Gaussian Graphical Model (γ = 0.50) to quantify centrality (Strength, expected influen

SUBMITTER: Liu Y 

PROVIDER: S-EPMC12605024 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature