The investigators are aiming to examine the acceptability and feasibility of a portable bright light therapy instrument to improve sleep disturbance in a preventive intervention for depression. The investigators will conduct an intervention that trials the use of bright light glasses called "re-timers" as a preventive intervention in older adults with sleep disturbance and subsyndromal symptoms of depression.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
NONE
Enrollment
12
Participants will wear the Re-timer glasses for 30 minutes a day according to their sleep chronotype in weeks 3 and 4 of the study.
University of Michigan
Ann Arbor, Michigan, United States
Pittsburgh Sleep Quality Index
The Pittsburgh Sleep Quality Index is a validated scale which measures self-reported sleep quality based on a wide variety of questions (duration, quality, disturbances, medication, etc.) and converts them to a scale which ranges from 0 to 21 where 6 or higher denotes poor sleep quality.
Time frame: two weeks after introduction of intervention
Patient Health Questionnaire-9 Depression Scale
The PHQ-9 Depression Scale is a validated scale ranging from 0 to 27 with higher numbers representing greater severity of depressive symptoms, based on 9 questions with each question on a scale of 0 - 3.
Time frame: two weeks after introduction of intervention
Insomnia Severity Index Sum Scores
The Insomnia Severity Index measures insomnia severity on a scale from 0 to 28. A score of 15 or higher is indicative of clinical insomnia.
Time frame: two weeks after introduction of intervention
Morningness-Eveningness Questionnaire
The morningness- eveningness categories represent the time of day when a person is at their peak alertness.
Time frame: two weeks after introduction of intervention
Actigraph Sleep Data: Minutes Asleep
mean nightly sleep duration for each of the two-week periods: baseline and intervention
Time frame: daily for 4 weeks- baseline and intervention period
Actigraph: Number of Awakenings
Actigraphy counts awakenings by using an accelerometer to assess motion during the night. The number of awakenings is the mean nightly number of awakenings during each of the two-week periods: baseline and intervention.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Time frame: daily for 4 weeks- baseline and intervention period
Actigraph: Efficiency
Sleep efficiency is calculated as a percentage reflecting the amount of time in bed spent asleep (time asleep/time in bed x 100). The mean for each of the two-week periods: baseline and intervention, is calculated.
Time frame: daily for 4 weeks- baseline and intervention period
Fitbit Sleep Data: Sleep Duration
mean nightly sleep duration in minutes for each of the two-week periods: baseline and intervention
Time frame: daily for 4 weeks- baseline and intervention period
Fitbit Sleep Data: Night Awakenings
mean nightly awakenings for each of the two week periods: baseline and intervention. Similar to the actigraph the Fitbit counts awakenings through an accelerometer which measures motion.
Time frame: daily for 4 weeks- baseline and intervention period
Fitbit Sleep Data: Sleep Efficiency
Sleep efficiency is calculated as a percentage reflecting the amount of time in bed spent asleep (time asleep/time in bed x 100).
Time frame: daily for 4 weeks- baseline and intervention period
Self-Reported Sleep Diary: Time at Which Participants go to Bed
Bed time represents the moment in time at which participants went to bed, measured on a revised clock where 6pm = 18, Midnight = 24 and 6am =30. Time between actual hours is calculated on a decimal basis, so an additional 6 minutes = .1. This revised clock is necessary in order to make means work properly in the nighttime hours. Otherwise, averaging between a 10pm bedtime and a 2am bedtime would give the impossible, inaccurate mean of being in the daytime between those two numbers.
Time frame: daily for 4 weeks- baseline and intervention period to be compared
Self-Reported Sleep Diary: Time at Which Participants Wake up
Wake time represents the moment in time at which participants awaken. Time between actual hours is calculated on a decimal basis so an additional 6 minutes = .1. so that 7.5 represents 7:30 a.m. and 7.8 represents 7:48 a.m.
Time frame: daily for 4 weeks- baseline and intervention period to be compared
Self-Reported Sleep Diary: Sleep Quality
sleep quality is a participants' mean self-report for each of the two week periods: baseline and intervention. Sleep quality is reported for each night on a scale of 0 (very poor) to 4 (very good).
Time frame: daily for 4 weeks- baseline and intervention period to be compared
Self-Reported Sleep Diary: Night Awakenings
mean number of night awakenings per person per night as reported in sleep diaries
Time frame: daily for 4 weeks- baseline and intervention period to be compared
Self-Reported Sleep Diary: Sleep Duration
nightly mean of length of sleep measured in minutes
Time frame: daily for 4 weeks- baseline and intervention period to be compared