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: 8105524
• 负责人: Robert Lee Newton
• 金额: $ 6.1万
• 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 2013-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8105524
• 关键词: Accounting; Adult; African American; American; Behavior; Books; Cardiovascular Diseases; Caucasians; Caucasoid Race; Chronic Disease; Cities; Computers; Control Groups; Development; Diabetes Mellitus; Diet; Effectiveness of Interventions; Enrollment; Epidemiologic Studies; Health; Health Status; Health behavior outcomes; Heart; Hypertension; Life; Life Style; Light; Light Exercise; Measurement; Measures; Metabolic syndrome; Obesity; Odds Ratio; Outcome; Participant; Patient Self-Report; Physical activity; Principal Investigator; Randomized; Reading; Recruitment Activity; Reporting; Rest; Risk Estimate; Risk Factors; Role; Sampling; Series; Testing; Time; Validation; Validity of Self Report; Walking; Woman; cardiovascular disorder risk; cardiovascular risk factor; design; group intervention; health disparity; intervention program; men; primary outcome; 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志物（Jakes et al，2003）和心血管疾病发展（Sidney et al，1996）的独立风险因素。尽管存在健康风险，但据估计，久坐不动的美国人的比例为30%至40%（Sidney et al，1996; Yancey et al，2004）。研究表明，非裔美国人比白人花更多的时间从事久坐行为（Sidney等人，1996年; USDHHS，2001年）。一份报告显示，近60%的非洲裔美国男性和女性过着久坐不动的生活方式（Karter等人，1998年）。非裔美国人不成比例地患有各种健康状况，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，非洲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。久坐行为传统上是通过自我报告来评估的。这些自我报告的措施受到一些潜在的问题，包括回忆偏见，评估只在休闲时间，缺乏验证对客观措施。因此，需要对久坐行为进行客观的测量。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（2005）表示，需要成年人的久坐行为临界点。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年人久坐行为的客观阈值。本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。该研究的第三个目的是开发和评估旨在减少成年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临界点，每个参与者将在从事一系列活动时佩戴加速计，这些活动从久坐到中等体力活动，包括休息、看电视、坐在桌子上、阅读书和在跑步机上行走。为了开发久坐行为的自我报告测量，将从身体活动纲要（Ainsworth et al，2000）中提取小于1.5 MET的活动。将在参与者佩戴加速计的两周内进行测量，以建立自我报告测量的重测信度和标准效度。将通过将临界点应用于杰克逊心脏研究（JHS）中使用的加速度计，评估客观定义的久坐行为与健康结局之间的关系。JHS是对非裔美国成年人心血管疾病前因的流行病学研究。超过400名参与者参加了饮食和身体活动子研究，该研究要求他们在基线时佩戴加速度计。在这项初步研究之后，将计划进行第二项研究，旨在减少非洲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的一个大城市招募，并将被随机分配到干预组或对照组。社会认知理论指导了6个月干预计划的制定。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，久坐行为的分钟数，将通过加速度计进行评估。

项目成果

Profiles of sedentary behavior in children and adolescents: the US National Health and Nutrition Examination Survey, 2001-2006.

• DOI: 10.3109/17477160902934777
• 发表时间: 2009
• 期刊: International journal of pediatric obesity : IJPO : an official journal of the International Association for the Study of Obesity
• 作者: Sisson SB;Church TS;Martin CK;Tudor-Locke C;Smith SR;Bouchard C;Earnest CP;Rankinen T;Newton RL;Katzmarzyk PT
• 通讯作者: Katzmarzyk PT