| Summary: | Sze-Yu Chen,1 Chun-Hao Chen,1 Chen Lo,1 Mong-Liang Lu,2 Cheng-Dien Hsu,3 Yi-Hang Chiu,2 Chun-Hsin Chen,2 Shih-Ku Lin,4,5 Ming-Chyi Huang,5 Hsi-Chung Chen,1,6 Po-Hsiu Kuo1,7 1Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan; 2Department of Psychiatry, Wan-Fang Hospital & School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; 3Department of Psychosomatic Medicine, Taiwan Adventist Hospital, Taipei, Taiwan; 4Department of Psychiatry, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; 5Department of Psychiatry, Taipei City Hospital, Songde Branch, Taipei, Taiwan; 6Center of Sleep Disorders, National Taiwan University Hospital, Taipei, Taiwan; 7Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, TaiwanCorrespondence: Hsi-Chung Chen Email hsichungchen@ntu.edu.twPurpose: This study aimed to elucidate the various co-occurring patterns of depressive symptomatology and sleep-wake-related disturbances (SWRDs) in patients with mood disorders.Patients and Methods: Individuals in non-acute states of major depressive disorder or bipolar disorder were recruited. The Beck Depression Inventory II (BDI-II) was utilized to evaluate depressive symptoms. BDI-II items were classified into three domains: cognitive, affective, and somatic. Between-domain differences with various SWRDs were examined. Latent class analysis was used to empirically classify participants using BDI-II items as indicator variables. Co-occurring patterns between domains of BDI-II items and SWRDs were re-examined in each subgroup to elucidate inter-individual differences.Results: In total, 657 participants were enrolled. Of participants, 66.8% were female, and 52.4% were diagnosed with major depressive disorder. Each BDI-II domain exhibited different co-occurring patterns. The somatic domain was most likely to co-occur with various SWRDs. Three subgroups were derived from latent class analysis and were designated as poor sleep quality and high insomnia (n=150), poor sleep quality and moderate insomnia (n=248), and poor sleep quality and low insomnia (n=159). The group with more severe insomnia presented with more severe depressive and anxiety symptoms. The three subgroups further differed in co-occurring patterns. From the low insomnia to high insomnia group, the associations with various SWRDs appeared in the sequence of somatic, affective, and cognitive domains.Conclusion: Co-occurring patterns between domains of depressive symptomatology with various SWRDs differ and may vary among individuals.Keywords: co-occurring, latent class analysis, mood disorders, sleep-wake-related disturbance, depression
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