Sleep Duration and Cardiovascular Health
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 24
- 试验地点
- 1
- 主要终点
- Blood pressure
研究概览
简要总结
This is a cross-sectional study with an optional intervention that will examine how extreme sleep durations relate to cardiovascular health, physical activity, and sleep quality by studying three groups of participants: short sleepers (≤ 6 hrs), long sleepers (≥ 9 hrs), and average duration sleepers (7-8 hrs). The optional intervention asks participants to maintain an 8-hour per night regular sleep schedule for one week.
详细描述
PRIMARY OBJECTIVES:
1. To test the hypothesis that vascular endothelial function in the brachial artery, and other associated cardiovascular risk markers are impaired in short sleepers and long sleepers as compared to the control group of average duration sleepers.
To test the hypothesis that the optional intervention to maintain an 8-hour per night sleep schedule will alleviate vascular endothelial function impairment.
OUTLINE:
Participants will measure sleep, physical activity, and blood pressure with at-home devices before coming in for one in-lab visit, where they will have vascular function and blood markers measured, as well as an optional CT scan to measure calcium in the coronary arteries. An optional intervention may occur after this: Participants will continue the at-home measures while maintaining a chosen regular 8-hour per night sleep schedule, before coming in for a second in-lab visit with all same measures except for CT scan.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 25 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Men and women ages 25-65y
- •Lean and overweight (BMI 18.5-40 kg/m2)
- •No acute, chronic, or debilitating medical conditions
- •No prescription/non-prescription medications or drugs of abuse
- •Current non-smoker (tobacco and marijuana)
- •Persons who fit all the above criteria and are suitable based on a medical history and health habits questionnaire, and additional sleep and health profiling questionnaires may be eligible to participate.
排除标准
- •Persons with any acute, chronic, or debilitating medical condition except pre-hypertension will be excluded.
- •Persons with any symptoms of acute or active illness (e.g. fever, leukocytosis) will be excluded.
- •Persons with a history of severe psychiatric illness or psychiatric disorders will be excluded.
- •Persons with a history of regular night/or rotating shift work in the past year, or who have traveled more than three time zones during the one month prior to the study will be excluded.
- •Pregnant women, decisionally impaired adults, and prisoners will be excluded.
研究组 & 干预措施
Long Sleepers
Reported nightly sleep time of ≥9 hours
干预措施: Regularized Sleep Schedule (Behavioral)
Average Duration Sleepers
Reported nightly sleep time of 7-8 hours
干预措施: Regularized Sleep Schedule (Behavioral)
Short Sleepers
Reported nightly sleep time of ≤6 hours
干预措施: Regularized Sleep Schedule (Behavioral)
结局指标
主要结局
Blood pressure
时间窗: 2 weeks
Blood pressure (systolic and diastolic) will be measured in a supine position in the dominant arm.
Timing of caloric intake
时间窗: 2 weeks
Timing of caloric intake may be measured by participant completion of a 7-day photographic food diary before the in-lab visits. MealLoggerTM(Wellness Foundry, New York, http://www.meallogger.com). Photographs are time stamped, indicating timing of caloric intake.
Sleep duration
时间窗: 2 weeks
Sleep duration will be scored from the ActiGraph and correlated with the sleep and activity diary.
24-hour BP measurement
时间窗: 2 weeks
Investigators will measure 24-hour ambulatory blood pressure (AMBP, Spacelabs, Inc) for 24-h period before each in-lab visit, including the optional visit. Both systolic and diastolic blood pressure will be measured.
Sleep efficiency
时间窗: 2 weeks
Sleep efficiency will be scored from the ActiGraph and correlated with the sleep and activity diary. Sleep efficiency measures amount of time asleep while in bed. This is measured from 0-100%, where 0 indicates low sleep efficiency, or no sleep in bed, and higher percent indicates more sleep, or higher sleep efficiency while in bed.
Physical Activity
时间窗: 2 weeks
Activity will be scored from the ActiGraph and correlated with the sleep and activity diary.
Total Mood Disturbance
时间窗: 2 weeks
Total Mood Disturbance will be measured from the Profile of Mood States (POMS) questionnaire. Participants will rate their mood states on a likert scale of 0-4. POMS may indicate both positive and negative moods. There is a minimum score of 0, and maximum of 260. In general, lower scores indicate less mood disturbance, while higher scores indicate higher mood disturbance. Subsets of particular scores may indicate particular mood states.
Content of caloric intake
时间窗: 2 weeks
Content of caloric intake may be measured by participant completion of a 7-day photographic food diary before the in-lab visits. MealLoggerTM(Wellness Foundry, New York, http://www.meallogger.com) These photographs may be assessed to identify micronutrients and macronutrients in content of food.
Blood fasting glucose
时间窗: 2 weeks
Blood fasting glucose (measured in plasma according to laboratory values) may be measured by a complete blood count after blood draw. This is a hypothesis generating variable. Higher values may indicate increased cardiovascular risk.
C-reactive protein
时间窗: 2 weeks
C-reactive protein (measured in plasma according to laboratory values) may be measured by lab tests after blood draw as a blood inflammatory marker. This is a hypothesis generating variable. Higher values may indicate increased cardiovascular risk.
Blood cortisol
时间窗: 2 weeks
Cortisol (measured in plasma according to laboratory values) may be measured by lab tests after blood draw as a measure of stress. This is a hypothesis generating variable. Higher values may indicate increased cardiovascular risk.
Interleukins
时间窗: 2 weeks
Interleukin 6 (IL-6), Interleukin 1(IL-1 β), interleukin-1 receptor antagonist (IL-1RA), interleukin 18 (IL-18), measured in plasma according to laboratory values, may be measured by lab tests after blood draw as blood inflammatory markers. This is a hypothesis generating variable. Higher values may indicate increased cardiovascular risk.
Vascular Endothelial Function
时间窗: 2 weeks
Investigators will measure endothelial function as flow-mediated dilation.
Coronary Atherosclerotic Burden
时间窗: 2 weeks
Investigators may measure coronary atherosclerotic measure from a computerized tomography (CT) scan. This measure is optional for participants. The scan will be used to calculate coronary artery calcium score (CAC score and/or Agatston score). The CAC score indicates risk of future coronary artery events. A CAC score of 0 indicates absence of coronary artery calcification. A score of 0 is very low risk, and risk increases with increasing numbers (e.g. 100-300 is increased risk, \>300 is very high risk). Higher scores may indicate higher risk of future coronary events. The Agatston score is also an atherosclerotic measure that may indicate risk of future coronary artery events. Agatston also goes up from 1 on a linear scale (e.g. 1-100 is discreet atherosclerosis, up to 400 is moderate, \>400 is severe).
Cardiovascular Risk
时间窗: 2 weeks
Investigators will measure cardiovascular risk as carotid intima-media thickness (IMT).
Heart rate
时间窗: 2 weeks
Heart rate will be measured as beats per minute while participants are in a supine position.
Blood Cholesterol
时间窗: 2 weeks
Blood cholesterol (measured in plasma according to laboratory values) may be measured by a complete blood count after blood draw. This is a hypothesis generating variable. Higher values may indicate increased cardiovascular risk.
Plasminogen activator inhibitor-1
时间窗: 2 weeks
Plasminogen activator inhibitor-1 (measured in plasma according to laboratory values) may be measured by lab tests after blood draw as a blood inflammatory marker. This is a hypothesis generating variable. Higher values may indicate increased cardiovascular risk.
P-selectin
时间窗: 2 weeks
P-selectin (measured in plasma according to laboratory values) may be measured by lab tests after blood draw as a blood inflammatory marker. This is a hypothesis generating variable. Higher values may indicate increased cardiovascular risk.
Body Mass Index (BMI)
时间窗: 2 weeks
Weight and height will be combined to report BMI in kg/m\^2.
次要结局
未报告次要终点
研究者
Saurabh Thosar
Assistant Professor
Oregon Health and Science University