Effect of Personalized Blue-Enriched White Light Intervention on Rest–Activity and Light Exposure Rhythms in Mild and Moderate Alzheimer’s Disease

• 발행기관: 대한신경정신의학회
• 저자명: Seong Jae Kim Jung Hie Lee Jae-Won Jang Sun Hee Lee In Bum Suh Jin Hyeong Jhoo
• 간행물 정보: 『Psychiatry Investigation』제20권 제11호, 1007~1017쪽, 전체 11쪽
• 주제분류: 의약학 > 정신과학
• 파일형태: PDF
• 발행일자: 2023.11.21

국문 초록

Objective We aimed to examine the effectiveness of personalized light intervention using a blue-enriched light-emitting-diodes device on rest–activity rhythm (RAR) and light exposure rhythm (LER) in patients with mild and moderate Alzheimer’s disease (AD). Methods AD patients with poor sleep quality and/or insomnia symptoms were assigned into either an experimental group (EG) or control group (CG) in a single-blind design. Personalized light intervention was given at 9–10 h after individual dim light melatonin onset, lasting for 1 h every day for two weeks in the EG (77.36±5.79 years, n=14) and CG (78.10±7.98 years, n=10). Each patient of CG wore blue-attenuating sunglasses during the intervention. Actigraphy recording at home for 5 days was done at baseline (T0), immediate postintervention (T1), and at four weeks after intervention (T2). The variables of RAR and LER were derived using nonparametric analysis. Results We found a significant time effect on the intradaily variability (IV) of RAR at T2 with respect to T0 (p=0.039), indicating reduced IV of RAR at four weeks after personalized light intervention regardless of blue-enriched light intervention. There was a time effect on the IV of LER at T1 with respect to T0 (p=0.052), indicating a reduced tendency in the IV of LER immediately after intervention. Conclusion Our personalized light intervention, regardless of blue-enriched light source, could be useful in alleviating fragmentation of RAR and LER in AD patients.

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키워드

Alzheimer’s disease Personalized light intervention Rest–activity rhythm Light exposure rhythm Intradaily variability