Moonoh Bae1, Kounseok Lee1, Ji Hyun Baek1, Ji Sun Kim2, Youngah Cho1, Seunghyong Ryu1, Kyooseob Ha3, Kyung Sue Hong4. 1. Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea. 2. Department of Neuropsychiatry, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Kyunggi-Do, Korea. 3. Department of Neuropsychiatry, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Kyunggi-Do, Korea; Seoul National Hospital, Seoul, Korea. 4. Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea; Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea. Electronic address: hongks@skku.edu.
Abstract
OBJECTIVES: Disturbances of the sleep-wake cycle and seasonality have been reported in patients with bipolar disorder (BD). Considering that BD seems to be a spectrum condition in terms of clinical and biological characteristics, circadian and seasonal rhythm related to BD could be detected in non-clinical individuals with subthreshold bipolarity. The aim of this study was to screen past hypomanic symptoms in non-clinical samples and investigate their association with deviated sleep-wake cycle and seasonality. METHODS: Lifetime history of hypomanic symptoms was assessed with the Hypomania Checklist-32 (HCL-32). Circadian preference, variability of sleep-wake time and seasonal changes in mood and behavior were evaluated on a lifetime-basis in non-clinical adult samples (n=313), using the Composite Scale of Morningness (CSM), the Sleep Timing Questionnaire (STQ), and the Seasonal Pattern Assessment Questionnaire (SPAQ). RESULTS: Two subdomains of hypomanic symptoms were identified through factor analysis of HCL-32, i.e., "active/elated" factor and "irritable/risk-taking" factor. The HCL-32 total score (p<0.001) and the "active/elated" factor score (p=0.028) were weakly correlated only with seasonality, whereas the "irritable/risk-taking" factor score was associated not only with seasonality (p<0.001), but also with evening preference (p<0.001) and irregularity of sleep-wake times (p=0.001~0.011). CONCLUSION: Circadian and seasonal characteristics related to BD are also associated with a past history of hypomanic symptoms in non-clinical samples, especially "irritable/risk-taking" symptoms, suggesting the existence of subclinical presentation of BD and their biological traits.
OBJECTIVES: Disturbances of the sleep-wake cycle and seasonality have been reported in patients with bipolar disorder (BD). Considering that BD seems to be a spectrum condition in terms of clinical and biological characteristics, circadian and seasonal rhythm related to BD could be detected in non-clinical individuals with subthreshold bipolarity. The aim of this study was to screen past hypomanic symptoms in non-clinical samples and investigate their association with deviated sleep-wake cycle and seasonality. METHODS: Lifetime history of hypomanic symptoms was assessed with the Hypomania Checklist-32 (HCL-32). Circadian preference, variability of sleep-wake time and seasonal changes in mood and behavior were evaluated on a lifetime-basis in non-clinical adult samples (n=313), using the Composite Scale of Morningness (CSM), the Sleep Timing Questionnaire (STQ), and the Seasonal Pattern Assessment Questionnaire (SPAQ). RESULTS: Two subdomains of hypomanic symptoms were identified through factor analysis of HCL-32, i.e., "active/elated" factor and "irritable/risk-taking" factor. The HCL-32 total score (p<0.001) and the "active/elated" factor score (p=0.028) were weakly correlated only with seasonality, whereas the "irritable/risk-taking" factor score was associated not only with seasonality (p<0.001), but also with evening preference (p<0.001) and irregularity of sleep-wake times (p=0.001~0.011). CONCLUSION: Circadian and seasonal characteristics related to BD are also associated with a past history of hypomanic symptoms in non-clinical samples, especially "irritable/risk-taking" symptoms, suggesting the existence of subclinical presentation of BD and their biological traits.
Authors: Leila Jahangard; Anahita Rahmani; Mohammad Haghighi; Mohammad Ahmadpanah; Dena Sadeghi Bahmani; Ali R Soltanian; Shahriar Shirzadi; Hafez Bajoghli; Markus Gerber; Edith Holsboer-Trachsler; Serge Brand Journal: Front Psychol Date: 2017-12-12
Authors: Michael J McCarthy; John F Gottlieb; Robert Gonzalez; Colleen A McClung; Lauren B Alloy; Sean Cain; Davide Dulcis; Bruno Etain; Benicio N Frey; Corrado Garbazza; Kyle D Ketchesin; Dominic Landgraf; Heon-Jeong Lee; Cynthia Marie-Claire; Robin Nusslock; Alessandra Porcu; Richard Porter; Philipp Ritter; Jan Scott; Daniel Smith; Holly A Swartz; Greg Murray Journal: Bipolar Disord Date: 2021-12-10 Impact factor: 5.345