Figure 1.

Multiple regression method of the indirect mediation model [18]. Path a indicates the path from sleep quality (exposure) to mediator (i.e., inflammation, oxidative stress, and antioxidant). Path b indicates the path from mediator to outcome (i.e., metabolic syndrome (MetS), number of MetS components, and individual MetS components) controlling for the mediator. Path c indicates the path from exposure to outcome. Path c′ indicates the path from exposure to outcome controlling for the mediator.