Measurement of Sedentary Behavior in African American Adults

非裔美国成年人久坐行为的测量

• 批准号: 7456595
• 负责人: Robert Lee Newton
• 金额: $ 6.56万
• 依托单位: LSU PENNINGTON BIOMEDICAL RESEARCH CTR
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7456595
• 关键词: Accounting; Adult; African American; American; Behavior; Books; Cardiovascular Diseases; Caucasians; Caucasoid Race; Chronic Disease; Cities; Computers; Condition; Control Groups; Development; Diabetes Mellitus; Diet; Effectiveness of Interventions; Enrollment; Epidemiologic Studies; Health; Health Status; Health behavior outcomes; Heart; Hypertension; Intervention; Life; Life Style; Light; Light Exercise; Measurement; Measures; Metabolic syndrome; Numbers; Obesity; Odds Ratio; Outcome; Participant; Patient Self-Report; Physical activity; Principal Investigator; Randomized; Range; Reading; Recruitment Activity; Reporting; Rest; Risk Estimate; Risk Factors; Role; Sampling; Series; Standards of Weights and Measures; Testing; Time; Validation; Validity of Self Report; Walking; Week; Woman; cardiovascular disorder risk; cardiovascular risk factor; design; health disparity; intervention program; men; programs; sedentary; social cognitive theory; therapy design

DESCRIPTION (provided by applicant): A sedentary lifestyle has been shown to be an independent risk factor for markers of cardiovascular disease risk (Jakes et al, 2003) and the development of cardiovascular diseases (Sidney et al, 1996). Despite the health risks, estimates of the percentage of Americans who are sedentary range from 30 to 40% (Sidney et al, 1996; Yancey et al, 2004). It has been shown that African Americans spend more time engaged in sedentary behaviors than do their Caucasian counterparts (Sidney et al, 1996; USDHHS, 2001). One report has shown that nearly 60% of African American men and women live a sedentary lifestyle (Karter et al, 1998). African Americans suffer disproportionately from various health conditions, including obesity, hypertension, and diabetes. It appears that sedentary behavior is a contributing factor to the health status of African Americans. Thus, African American adults are prime targets for studying the relationship between sedentary behavior and cardiovascular disease, and are also ideal targets for intervention designed to decrease sedentary behavior. Sedentary behavior has traditionally been assessed via self-report. These self-reported measures are subject to a number of potential problems, including recall bias, assessment only during leisure time, and lack of validation against an objective measure. Thus, there is a need for an objective measure of sedentary behavior. Accelerometers provide a way to objectively measure sedentary behavior. Currently, thresholds for light, moderate and vigorous activity have been developed for adults, yet there are no thresholds that are used to define sedentary behavior. The need for adult cut-points for sedentary behavior was expressed Matthews (2005). The primary aims for the study are threefold. One of the primary aims of the study is to develop objective thresholds of sedentary behavior in adults. The second aim of the study is to develop and validate a self-report measure of sedentary behavior. A third aim of the study is to develop and assess the effectiveness of an intervention designed to reduce physical activity in adults. All of these aims will be achieved in samples of African American adults. To establish cut-points for sedentary behavior, each participant will wear an accelerometer while engaging in a series of activities ranging from sedentary to moderate physical activity, including resting, watching TV, sitting a desk, reading a book, and walking on a treadmill. In order to develop a self-report measure of sedentary behavior, activities less than 1.5 METs will be extracted from the Compendium of Physical Activities (Ainsworth et al, 2000). The measure will be administered while participants wear an accelerometer for two, one-week periods in order to establish the test-retest reliability and criterion validity of the self-report measure. The relationship between objectively defined sedentary behavior and health outcomes will be assessed by applying the cut-points to the accelerometers that were used in the Jackson Heart Study (JHS). The JHS is an epidemiological study of the antecedents of cardiovascular disease in African American adults. Over four hundred of those enrolled participated in the Diet and Physical Activity Substudy, which required that they wear an accelerometer at baseline. Following this initial study, a second study will be planned that is designed to decrease sedentary behavior in African American adults. This will involve recruiting a new sample of participants. These adults will be recruited from a large Southern city and will be randomly assigned to either the intervention group or the control group. The Social Cognitive Theory guides the development of the 6-month intervention program. The control group will attend several sessions over this same time frame that focus on providing information on physical activity. The primary outcome variable, minutes of sedentary behavior, will be assessed via accelerometers.

描述（由申请人提供）：久坐的生活方式已被证明是心血管疾病风险标记（Jakes 等，2003）和心血管疾病发展（Sidney 等，1996）的独立危险因素。尽管存在健康风险，但据估计久坐不动的美国人比例在 30% 到 40% 之间（Sidney 等人，1996 年；Yancey 等人，2004 年）。研究表明，非裔美国人比白种人花更多的时间进行久坐行为（Sidney 等人，1996 年；USDHHS，2001 年）。一份报告显示，近 60% 的非裔美国男性和女性过着久坐的生活方式（Karter 等，1998）。非裔美国人不成比例地患有各种健康问题，包括肥胖、高血压和糖尿病。久坐行为似乎是影响非裔美国人健康状况的一个因素。因此，非裔美国成年人是研究久坐行为与心血管疾病之间关系的主要目标，也是旨在减少久坐行为的干预措施的理想目标。传统上，久坐行为是通过自我报告来评估的。这些自我报告的衡量标准存在许多潜在问题，包括回忆偏差、仅在闲暇时间进行评估以及缺乏对客观衡量标准的验证。因此，需要对久坐行为进行客观测量。加速度计提供了一种客观测量久坐行为的方法。目前，已经为成年人制定了轻度、中度和剧烈活动的阈值，但还没有用于定义久坐行为的阈值。马修斯（Matthews，2005）表达了成人久坐行为的临界点的必要性。这项研究的主要目的有三个。该研究的主要目的之一是制定成人久坐行为的客观阈值。该研究的第二个目的是开发和验证久坐行为的自我报告测量方法。该研究的第三个目的是开发和评估旨在减少成人体力活动的干预措施的有效性。所有这些目标都将在非裔美国成年人的样本中实现。为了建立久坐行为的切入点，每个参与者都将佩戴加速度计，同时进行一系列从久坐到适度体力活动的活动，包括休息、看电视、坐在办公桌前、读书和在跑步机上行走。为了制定久坐行为的自我报告测量方法，将从身体活动纲要中提取低于 1.5 MET 的活动（Ainsworth 等人，2000 年）。该测量将在参与者佩戴加速度计两周（为期一周）的情况下进行，以便建立自我报告测量的重测可靠性和标准有效性。客观定义的久坐行为与健康结果之间的关系将通过将切点应用于杰克逊心脏研究（JHS）中使用的加速度计来评估。 JHS 是一项针对非裔美国成年人心血管疾病发生原因的流行病学研究。超过 400 名参与者参加了饮食和体育活动子研究，该研究要求他们在基线时佩戴加速计。在这项初步研究之后，将计划进行第二项研究，旨在减少非裔美国成年人的久坐行为。这将涉及招募新的参与者样本。这些成年人将从南方大城市招募，并被随机分配到干预组或对照组。社会认知理论指导为期 6 个月的干预计划的制定。对照组将在同一时间段内参加几次会议，重点是提供有关身体活动的信息。主要结果变量，即久坐行为的分钟数，将通过加速度计进行评估。