This study is conducted by the Sleep and Chronobiology Laboratory at the University of Colorado at Boulder.
Study Requirements: Healthy Men & Women Age 18-45
This study is about how typical artificial indoor lighting versus a simulation of a natural sunset influences the timing of the human body clock. The body clock controls 24-hour patterns of physiology such as sleep and hormone release. This work will have important implications for determining how implementation of new lighting technology can be used to promote sleep.
Prior to the start of this study, there is a screening appointment to ensure you meet the criteria for the study. The screening procedure involves questionnaires about sleep and medical/psychological health. All of the results of the screening procedure are confidential, and will only be used by the study staff to determine eligibility for the study.
Following the screening appointment, we ask you to wear a special watch that records activity levels for one week prior to your first visit to the lab. We also ask you to keep a sleep/wake log and call into our answering machine to inform us when you go to bed and wake up each day. During the week between your first and second laboratory visits we will ask you to continue to wear the special watch, keep a sleep/wake log, and call into our answering machine.
During your laboratory study visit, you will come to the lab at the University of Colorado at Boulder for 7 hours on two different occasions. During the study, the lighting conditions will be changed to simulate either typical artificial indoor lighting or a simulated natural sunset. Throughout the study, you will be asked to maintain the same posture and we will ask you to perform a number of computer tasks. We will also take saliva samples to test for hormones. At the end of the study visit, you will be asked to fall asleep at your habitual bedtime, but we will wake you up shortly after falling asleep. You will then be permitted to leave the lab. After another week of home monitoring (identical to the first week of the study), these procedures will be repeated in a second study visit.
If you are eligible to participate in this study, you will be financially compensated for your involvement after the screening procedures. You will be compensated $50 for each week of activity monitoring and $50 for each visit to the laboratory. The total compensation can be up to $200.
If you are interested in applying to participate in this study, please complete this on-line application survey. We will contact you within one week. If you need assistance with this survey, have additional questions about the study, or would like to complete the survey via the telephone, please contact us at (303) 735-1923 (M-F, 9am-5pm).
Checking "I agree" documents that you have read the information about the study and give your permission to take part in the initial screening for this research.
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I agree
I do not agree
What is your name?
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What is your sex?
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Female Male
What is your address?
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What is your phone number?
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What is your email address?
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How old are you?
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What is your date of birth? (MM-DD-YYYY)
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Today M-D-Y
What is your current occupation?
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On average, how many hours per week do you work?
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What month(s) would you be available to spend 7 hours in the afternoon/evening, one week apart, in the laboratory for the study?
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Have you ever participated in a research study?
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Yes
No
What type of research study did you participate in?
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When did you participate in a research study?
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Did the research study involve taking medication? If so, please list the name of the medication.
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How tall are you (feet, inches)?
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How much do you weigh (in pounds)?
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How long have you weighed this much?
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What is the most that you have weighed in your lifetime, excluding pregnancy (in pounds)?
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Do you exercise regularly?
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Yes
No
How often do you exercise?
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What type of exercise do you do?
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Which is your dominant hand?
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Left
Right
Both
Have you ever been diagnosed with a medical problem or illness?
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Yes
No
What medical problem(s) or illness(es) have you been diagnosed with, and when did this occur?
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Have you ever been diagnosed with a psychological or psychiatric problem or illness?
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Yes
No
What psychological or psychiatric problem(s) or illness(es) have you been diagnosed with, and when did this occur?
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Do you use any prescription medication?
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Yes
No
Please provide the name of the medication(s), dose, length of use, and the reasons you are using it.
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Do you use hormones (e.g. contraceptive birth control), inhalers, or medicated patches (e.g. birth control, nicotine)?
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Yes
No
Please provide the name of the hormone, inhaler, or patch, the dose, how long you have been using it, and for what purpose.
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Next is a series of questions about your medical history. Please indicate if you have now or have ever had any of the following conditions. If your response is "Yes" to a question, please explain when the problem was identified or diagnosed, what treatment you use(d) for it and when, and whether you experienced any complications from it.
Have you ever had heart disease or a heart murmur?
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Yes
No
What heart disease(s) or murmurs have you had? When were they identified? If they are treated, how? Have you had any complications from this?
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Have you ever had or do you currently have any type of lung disease?
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Yes
No
What lung disease(s) have you had? When were they identified? If they are treated, how? Have you had any complications from this?
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Have you ever had or do you currently have any type of kidney disease?
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Yes
No
What kidney disease(s) have you had? When were they identified? If they are treated, how? Have you had any complications from this?
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Have you ever had any type of stomach or intestine disease [e.g. ulcers, acid reflux, Irritable Bowel Syndrome (IBS)]?
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Yes
No
What stomach disease(s) have you had? When were they identified? If they are treated, how? Have you had any complications from this?
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Have you ever had and do you currently have any type of visual impairment?
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Yes
No
What type of visual impairment do you have?
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Do you wear contact lenses or glasses?
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Yes
No
What type of corrective lenses do you use?
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Primarily contact lenses Primarily eyeglasses Both contact lenses and eyeglasses
Have you had any eye injuries?
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Yes
No
What type of eye injury have you had? When did this occur? If it was treated, how? Have you had any complications from this?
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Do you have any hearing impairment?
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Yes
No
What type of hearing impairment do you have?
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Have you ever had any type of neurological disease (e.g. stroke, seizures, migraine headaches)?
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Yes
No
What type of neurological disease have you had? When was it identified? If it is treated, how? Have you had any complications from this?
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Have you experienced accidents, head injuries, concussions, or loss of consciousness?
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Yes
No
What was the nature of your accident, head injury, or concussion? What length of time did you lose consciousness for, if at all? When did the incident occur, what (if any) treatment have you undergone for it, and have you experienced any long term complications because of it?
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Have you ever had or do you currently have thyroid disease (e.g. hyper or hypothyroidism)?
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Yes
No
What type of thyroid disease have you had? When was it identified? If it is treated, how?
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Have you had or do you have high blood pressure?
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Yes
No
Do you have diabetes?
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Yes
No
Do you have hepatitis?
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Yes No I don't know
What type of hepatitis do you have?
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Have you ever had or do you now have asthma?
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Yes
No
Has your asthma been influenced by age, physical activity, or temperature? How do you manage or treat it?
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Have you ever had surgery?
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Yes
No
What type of surgery? When? Was local or general anesthesia used? Did you have any complications following the surgery?
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What type of caffeine do you typically consume? (check all that apply)
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How much coffee do you drink and how often? Please specify the size of the drink (e.g. 8 oz. or Starbucks grande size) and the number you consume per day, week, or month.
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How much caffeinated tea do you drink and how often? Please specify the size of the drink (e.g. 8 oz. or 1 mug) and the number you consume per day, week, or month.
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How many caffeinated soft drinks do you consume, and how often? Please specify the size of the drink (e.g. one 12 ounce can or one 20 ounce bottle) and how many you consume per day, week, or month.
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Please specify the energy drink you use, the size, and how many you consume per day, week, or month.
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How much chocolate do you eat and how often?
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Please indicate if you use the following: (check all that apply)
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What type of sedatives do you use, what dose, how often, and for what purpose?
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What type of pain reliever do you use, what dose, how frequently, and for what purpose?
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What antihistamines do you use, what dose, how frequently, and for what purpose?
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What type of antacid do you use, and how frequently, and for what purpose?
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Do you drink alcohol?
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Yes
No
On average, how many days per week or per month do you drink alcohol, and how much do you drink on each occasion?
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Do you ever use tobacco?
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Yes
No
What type of tobacco do you use? (check all that apply)
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How long have you chewed tobacco, and how often do you chew?
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How long have you smoked cigarettes, and how many cigarettes do you smoke per day?
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How long have you smoked cigars, pipe tobacco, or hookah and how much do you smoke per day?
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Do you have any problems with your sleep?
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Yes
No
What type of problems do you have with your sleep?
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How long does it usually take you to fall asleep?
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How many hours do you sleep in an average night?
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What is your usual bedtime on weekdays?
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Now H:M
What is your usual wake time on weekdays?
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Now H:M
What is your usual bedtime on weekends?
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Now H:M
What is your usual wake time on weekends?
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Now H:M
Have you traveled outside the mountain time zone within the past 3 months?
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Yes
No
Where did you go and what date did you return?
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Do you have future travel plans that may conflict with participation in this study; if so, when and to where?
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Have you ever worked the night shift?
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Yes
No
What hours did you work on the night shift?
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How many days per week did you work the night shift?
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How long (months or years) did you work night shifts?
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What month and year did you stop doing night shift work?
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As of today, how long have you lived at the altitude of Denver or higher?
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Do you use hormonal contraceptives?
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Yes
No
What type of hormonal contraceptive do you use?
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How long have you been using this hormonal contraceptive?
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How many days are there from the start of one menstrual period to the start of the next menstrual period for you?
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What was the start date of your last menstrual cycle?
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Today M-D-Y
What was the start date of your menstrual cycle prior to that (i.e. your second-to-last menstrual cycle)?
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Today M-D-Y
Is the number of days between your menstrual period consistent from month to month?
Yes
No
Please explain how the length of time between your menstrual periods varies from month to month.
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Have you given birth in the past year?
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Yes
No
Are you currently breastfeeding?
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Yes
No
I give my permission for my information to be included in the study doctor's recruitment database to take part in other current studies I may qualify for, or for future research.
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Yes
No
Initials
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If I answered yes, I understand that I may later change my mind, and that I can contact the Sleep and Chronobiology Staff in writing to have my contact information destroyed.