Aim 2 will investigate the effect of 3 different light exposure lengths on sleep, mood and agitation in persons with Alzheimer's disease. Participants will be randomly assigned to one of three conditions of light exposure: 1) 2-h morning light exposure; 2) 4-h morning light exposure; and 3) all day light exposure.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
135
Lighting intervention using high light levels designed to effect the circadian system
Lighting intervention using low light levels designed to not effect the circadian system
Icahn School of Medicine at Mount Sinai
Albany, New York, United States
Icahn School of Medicine at Mount Sinai
New York, New York, United States
Sleep Disturbance using the Pittsburgh Sleep Quality Index
The PSQI is used to measure sleep quality and is composed of 19 items that generate 7 component scores (subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleep medication, and daytime dysfunction). Each subscale is scored 0 to 3. The sum of the 7 component scores yields a single global score with a range of 0 to 21. A higher score indicates higher sleep disturbance
Time frame: up to week 14
Sleep efficiency using actigraphy
Actigraphs will be worn continuously for 7 days during each assessment week. Changes in sleep efficiency will be measured using the actigraphy software. Sleep efficiency is a calculated as a ratio of the time spent in bed and the time spent sleeping.
Time frame: up to week 14
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.