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자료유형
학술저널
저자정보
신진영 (연세대학교) 김경철 (Miz Medi Hospital) 이덕철 (연세대학교) 이혜리 (중앙대학교) 심재용 (연세대학교)
저널정보
대한가정의학회 Korean Journal of Family Medicine Korean Journal of Family Medicine 제38권 제4호
발행연도
2017.7
수록면
206 - 212 (7page)

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Background: We examined the association between salivary mitochondrial DNA (mtDNA) copy number and chronic fatigue combined with depression and insomnia.Methods: This cross-sectional study included 58 healthy adults with moderate to severe fatigue (Brief Fatigue In-ventory [BFI] ≥4) for longer than 6 months. Subjects were classified as those without combined symptoms, with ei-ther depression (Beck Depression Inventory [BDI] ≥13) or insomnia (Pittsburgh Sleep Quality Index [PSQI] ≥5), or with both depression and insomnia. Salivary mtDNA copy number was measured by real-time quantitative poly-merase chain reaction. The association was evaluated using a general linear model.Results: About 76% of participants had either depression or insomnia as additional symptoms. These subjects were predominately female, drank more alcohol, and exercised less than those without combined symptoms (P<0.05). The group with both depression and insomnia exhibited significantly higher BFI and lower mtDNA copy number than those without combined symptoms (P<0.05). After adjusting for confounding factors, significant negative as-sociations between mtDNA copy number and usual fatigue were found in the group without combined symptoms, whereas the negative associations in the group with combined symptoms were attenuated. BDI and PSQI were not associated with mtDNA copy number.Conclusion: Chronic fatigue is negatively associated with salivary mtDNA copy number. Salivary mtDNA copy number may be a biological marker of fatigue with or without combined symptoms, indicating that a separate ap-proach is necessary.

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