Changed Serum Levels of Sirtuin1 and Sirtuin3 and Their Correlations With Sleep Quality and Cognitive Function in the Patients With Chronic Insomnia Disorder

The goal of this study is to explore whether mitochondrial dysfunction exists in patients with chronic insomnia disorder. The main questions it aims to answer are : * Do serum mitochondrial markers change in patients with chronic insomnia? * Is there a relationship between serum mitochondrial markers and sleep and cognition in patients with chronic insomnia disorder? The researchers will compare serum mitochondrial marker levels among participants in the chronic insomnia group with those in the healthy group, and analyze the relationship between the markers and sleep and cognition of the participants. Participants will: * Complete polysomnography, the Pittsburgh Sleep Quality Index (PSQI), the Chinese-BeiJing version of the Montreal cognitive assessment (MoCA-C), the Blue Velvet Arena Test (BVAT), the Nine Box Maze Test (NBMT) to assess sleep and cognition. * The venous blood was drawn to detect mitochondrial marker levels.