National Health and Nutrition Examination Survey I: Epidemiologic Follow-Up Study, 1982-1984

The National Health and Nutrition Examination Survey I Epidemiologic Followup Study (NHEFS) originated as a joint project between the National Center for Health Statistics (NCHS) and the National Institute on Aging (NIA). The design of NHEFS, which contains follow-up data on the NHANES I cohort, consisted of five steps. The first step focused on tracing and locating all subjects in the cohort or their proxies and determining their vital status. The second step involved the obtaining of death certificates for subjects who were deceased. Interviews with the participants or their proxies constituted the third phase of the follow-up. The fourth phase of the follow-up included measurements of pulse, blood pressure, and weight for interviewed respondents, and the fifth step was the acquisition of relevant hospital and nursing home records, including pathology reports and electrocardiograms. The respondent interview was designed to gather information on selected aspects of the subject's health history since the time of the NHANES I exam. This information included a history of the occurrence or recurrence of selected medical conditions, an assessment of behavioral, social, nutritional, and medical risk factors believed to be associated with these conditions, and an assessment of various aspects of functional status. Whenever possible, the questionnaire was designed to retain item comparability between NHANES I and NHEFS in order to measure change over time. However, questionnaire items were modified, added, or deleted when necessary to take advantage of recent improvements in questionnaire methodology. The Vital and Tracing Status file is a master file containing tracing, vital status, and demographic data for all NHEFS respondents. In addition, it provides users with information on the availability of different survey components for each respondent. For example, variables have been created to indicate whether a death certificate was received for a deceased subject, hospital records were received, or a follow-up interview was completed. The Health Care Facility Record file offers data on respondents who had reported an overnight stay in a health care facility after 1970. Information on the name and address of the facility, the date of the stay, and the reason for the stay was recorded. The Mortality Data file contains death certificate information for 1,935 NHEFS decedents. The death certificate information is for deaths occurring from 1971 to 1983.

国家健康与营养调查I流行病学随访研究（NHEFS）源于国家卫生统计中心（NCHS）与国家老龄化研究所（NIA）的联合项目。NHEFS的设计包含对NHANES I队列的随访数据，共分为五个步骤。第一步着重于追踪和定位队列中的所有受试者或其代理人，并确定其生存状态。第二步涉及获取已故受试者的死亡证明。第三阶段为对参与者或其代理人进行的访谈。随访的第四阶段包括对受访者的脉搏、血压和体重进行测量，第五步则是获取相关医院和养老院的记录，包括病理报告和心电图。受访者访谈旨在收集自NHANES I考试以来受试者健康史方面的信息。这些信息包括所选医疗状况的发生或复发史，评估被认为与这些状况相关的行为、社会、营养和医疗风险因素，以及评估功能状态的各个方面。在可能的情况下，问卷设计旨在保持NHANES I与NHEFS项目之间项目的可比性，以衡量随时间的变化。然而，当需要利用问卷方法论的最新改进时，问卷项目会相应地进行修改、添加或删除。生存和追踪状态文件是一个主文件，包含所有NHEFS受访者的追踪、生存状态和人口统计数据。此外，它还为用户提供有关每个受访者不同调查组件可用性的信息。例如，已创建变量来指示是否收到了已故受试者的死亡证明，是否收到了医院记录，或者是否完成了随访访谈。医疗设施记录文件提供了1970年后报告在医疗设施过夜住宿的受访者的数据。记录了设施名称和地址、住宿日期以及住宿原因。死亡率数据文件包含1,935名NHEFS死者的死亡证明信息。这些死亡证明信息涉及1971年至1983年间发生的死亡。