Midlife in the United States (MIDUS Refresher): Biomarker Project, 2012-2016

These data are being released in BETA version to facilitate early access to the study for research purposes. This collection has not been fully processed by NACDA or ICPSR at this time; the original materials provided by the principal investigator were minimally processed and converted to other file types for ease of use. As the study is further processed and given enhanced features by ICPSR, users will be able to access the updated versions of the study. Please report any data errors or problems to user support and we will work with you to resolve any data related issues. The MIDUS Refresher study Survey (2011-2014 ICPSR 36532) recruited a national probability sample of 3,577 adults, aged 25 to 74, designed to replenish the original MIDUS 1 baseline cohort and paralleling the five decadal age groups of the MIDUS 1 baseline survey (ICPSR 2760). The MIDUS Refresher survey employed the same comprehensive assessments as those assembled on the core longitudinal MIDUS sample, but with additional questions about impacts of the economic recession of 2008-09. The MIDUS Refresher Biomarker study (2012-2016) obtained data from 863 respondents (n=746 Main sample, n=117 African Americans from Milwaukee) who completed the MIDUS Refresher Survey. The purpose of the Refresher Biomarker Project (Project 4) parallels that of the MIDUS 2 Biomarker project (ICPSR 29282), which collected comprehensive biological assessments on a subsample of MIDUS respondents, thus facilitating analyses that integrate behavioral and psychosocial factors with biological regulation/dysregulation, broadly defined. The aim was to use such data to explicate biopsychosocial pathways that contributed to diverse health outcomes. A further theme was to examine period effects on health (mental and physical) related to the economic recession by comparing the pre-recession MIDUS sample with the post-recession MIDUS Refresher sample. A further objective of the MIDUS Refresher sample was to strengthen cross-project analyses by increasing the sample sizes available for testing hypotheses regarding the interplay of key factors (e.g., socioeconomic status, gender, psychosocial factors, biological factors) in mid- and later-life health. Biomarker data collection was carried out at hypothalamic-pituitary-adrenal axis, the autonomic nervous system, the immune system, cardiovascular system, musculoskeletal system, antioxidants, and three General Clinical Research Centers (at UCLA, University of Wisconsin, and Georgetown University). The biomarkers reflect functioning of the metabolic processes. Our specimens (fasting blood draw, 12-hour urine, saliva) allowed for assessment of multiple indicators within these major systems. The protocol also included assessments by clinicians or trained staff, including vital signs, morphology, functional capacities including 3 dimensional gait analysis, bone densitometry, body composition, ankle brachial index, medication usage, and a physical exam. Project staff obtained indicators of heart-rate variability, beat to beat blood pressure, respiration, and salivary cortisol assessments during an experimental protocol that included both a cognitive and orthostatic challenge. Finally, to augment the self-reported data collected in Survey (Project 1), participants completed a medical history, self-administered questionnaire, and self-reported sleep assessments. For respondents at one site (UW-Madison), objective sleep assessments were also obtained with an Actiwatch(R) activity monitor.

本数据集以Beta版形式发布，旨在便于研究目的下对研究的早期访问。截至目前，该数据集尚未由NACDA或ICPSR进行全面处理；主要研究者提供的原始材料仅进行了最小化处理，并转换为其他文件类型以方便使用。随着ICPSR对研究进一步的加工和功能的提升，用户将能够访问研究更新的版本。请向用户支持报告任何数据错误或问题，我们将与您合作解决任何与数据相关的问题。MIDUS Refresher研究调查（2011-2014 ICPSR 36532）招募了3,577名成年人的全国概率样本，年龄在25至74岁之间，旨在补充原始MIDUS 1基线队列，并与MIDUS 1基线调查（ICPSR 2760）的五十年龄组相对应。MIDUS Refresher调查采用了与核心纵向MIDUS样本相同的全面评估，但增加了关于2008-09年经济衰退影响的问题。MIDUS Refresher生物标志物研究（2012-2016）从完成了MIDUS Refresher调查的863名受访者（n=746主样本，n=117名来自密尔沃基的非洲裔美国人）中获取数据。Refresher生物标志物项目（项目4）的目的与MIDUS 2生物标志物项目（ICPSR 29282）相一致，该项目对MIDUS受访者的子样本进行了全面的生物评估，从而促进了将行为和心理社会因素与生物调节/失调（广义定义）相结合的分析。目的是利用这些数据阐明导致多种健康结果的生物心理社会途径。另一个主题是，通过比较经济衰退前后的MIDUS样本，研究经济衰退对健康（精神和身体）的周期性影响。MIDUS Refresher样本的另一个目标是，通过增加可用于测试关于关键因素（例如，社会经济地位、性别、心理社会因素、生物因素）在中年和晚年健康中相互作用假设的样本量，加强跨项目分析。生物标志物数据的收集涉及下丘脑-垂体-肾上腺轴、自主神经系统、免疫系统、心血管系统、骨骼肌肉系统、抗氧化剂和三个通用临床研究中心（位于UCLA、威斯康星大学和乔治敦大学）。生物标志物反映了代谢过程的功能。我们的样本（空腹血液采集、12小时尿液、唾液）允许评估这些主要系统中的多个指标。方案还包括由临床医生或经过培训的员工进行的评估，包括生命体征、形态学、功能能力包括三维步态分析、骨密度测量、身体成分、踝臂指数、药物使用和体格检查。项目工作人员在包括认知和直立挑战的实验方案中，获得了心率变异性、心跳间血压、呼吸和唾液皮质醇评估的指标。最后，为了补充调查（项目1）中收集的自我报告数据，参与者完成了医疗史、自我管理问卷和自我报告的睡眠评估。对于位于一个地点（UW-Madison）的受访者，还通过Actiwatch(R)活动监测器获得了客观的睡眠评估。