Tailored light treatment will increase sleep efficiency, reduce depression and reduce agitation scores in those with Alzheimer's disease and related dementia
In a within subjects, randomized placebo control study, a tailored light treatment will be used for short-term (4 weeks). Outcome measures include sleep measures (actigraphy), and questionnaires probing behavior and mood in those who have been diagnosed with Alzheimer's disease and related dementia. After a 4-week washout period, a placebo control inactive light will be used for another 4 weeks.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
44
The active intervention is a bluish white light source delivering at least 500 lux at the eye of the patient during at least 2 hours daily.
The inactive intervention is a yellowish white light source delivering at most 50 lux at the eye of the patient during at least 2 hours daily.
The Mid level active intervention is a bluish white light source delivering at least 300 lux at the eye of the patient during at least 2 hours daily.
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
Pittsburgh Sleep Quality Index (PSQI)
Caregivers (on behalf of subjects who cannot complete) and subjects are asked to complete the Pittsburgh Sleep Quality Index (PSQI), which is assessed at baseline and after 4 weeks they are exposed to the lighting intervention. The seven component scores are summed to provide a global score ranging from 0 to 21 and a score of 5 or above indicates sleep disturbance. A higher number indications a greater sleep disturbance
Time frame: Change from Baseline (week 0) and intervention (week 4)
Cohen-Mansfield Agitation Inventory (CMAI)
Caregivers (on behalf of subjects who cannot complete) and subjects are asked to fill out the Cohen-Mansfield Agitation Score, which is assessed at baseline and after 4 weeks they are exposed to the lighting intervention. 29 item instrument, each item scored 1-7. Total range score from 29-203 - a higher score indicates more agitation
Time frame: Change from Baseline (week 0) and intervention (week 4)
Cornell Scale for Depression in Dementia (CSDD) Questionnaire
Caregivers (on behalf of subjects who cannot complete) and subjects are asked to fill out subjective questionnaires assessing depression using the Cornell Scale for Depression in Dementia (CSDD) Questionnaires are assessed at baseline and after 4 weeks they are exposed to the lighting intervention. The CSDD consists of 19 questions rated on a scale of 0 to 2 with all scores summed for a total score range 0-38. A score greater than 12 indicates depression and a higher score indicates greater depression.
Time frame: Change from Baseline (week 0) and intervention (week 4)
Activity of Daily Living Questionnaire (MDS-ADL)
Caregivers (on behalf of subjects who cannot complete) and subjects are asked to fill out subjective Activity of Daily Living questionnaire (MDS-ADL), which is assessed at baseline and after 4 weeks they are exposed to the lighting intervention. Scores range from 4 to 18 and a higher score indicates a higher dependence.
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Time frame: Change from Baseline (week 0) and intervention (week 4)
Circadian Stimulus Dose
Subjects are asked to wear a calibrated light meter to obtain light/dark and activity/rest patterns for 7 days prior to intervention and for 7 days after 3 weeks that the light treatment is applied. These data are used to determine circadian disruption (correlation between light/dark and activity/rest) and light dose. Circadian stimulus (CS) is the amount of light needed to activate the circadian system. The range is 0 to 0.6 the higher the number the greater the CS dose
Time frame: Change from Baseline (week 0) and intervention (week 4)
Sleep Efficiency Score
Subjects are asked to wear an actigraph to obtain activity/rest patterns for 7 days prior to intervention and for 7 days after 3 weeks that the light treatment is applied. Actigraphs are used to measure sleep efficiency. Full scale score from 0-100, higher score indicates better efficiency.
Time frame: Change from Baseline (week 0) and intervention (week 4)