National Health and Nutrition Examination Survey I: Epidemiologic Follow-Up Study, 1987

The National Health and Nutrition Examination Survey I Epidemiologic Follow-Up Study (NHEFS) is a longitudinal study which uses as its baseline those adult persons aged 25 to 74 years who were examined in the first National Health and Nutrition Examination Survey (NHANES I). The NHEFS surveys were designed to investigate the association between factors measured at the baseline and the development of specific health conditions. The NHEFS is comprised of a series of follow-up surveys, three of which have been completed. The first wave of data collection, the 1982-1984 NHEFS (ICPSR 8900), included all persons who were between 25 and 74 years of age at their NHANES I examination. The second wave of data collection, the 1986 NHEFS (ICPSR 9466), included the NHEFS cohort who were 55-74 years at their baseline examination and not known to be deceased at the time of the 1982-1984 NHEFS. The third wave, the 1987 NHEFS, was conducted for the entire nondeceased NHEFS cohort. The 1982-1984 NHEFS 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 obtaining 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 1986 NHEFS assessed changes to the health and functional status of the oldest members of the NHEFS cohort since the last contact period. The 1987 NHEFS also collected information on changes in the health and functional status of the NHEFS cohort since the last contact period. The Vital and Tracing Status file contains summary information about the status of the entire NHEFS cohort. The Health Care Facility Record file contains information on reports of stays in hospitals and nursing homes as well as information abstracted from facility medical records. The Mortality Data file contains data abstracted from the death certificates from all three NHEFS surveys. The Interview Data file contains information on selected aspects of the subject's health history since the time of the NHANES I exam.

国家健康与营养考察调查I流行病学随访研究（NHEFS）是一项纵向研究，其基线数据来自首次国家健康与营养考察调查（NHANES I）中接受检查的25至74岁成年人群。NHEFS调查旨在探究基线测量因素与特定健康条件发展之间的关联。NHEFS由一系列随访调查组成，其中已完成三次。首次数据收集，即1982-1984年NHEFS（ICPSR 8900），纳入了在NHANES I检查时年龄在25至74岁之间的所有个人。第二次数据收集，1986年NHEFS（ICPSR 9466），纳入了基线检查时年龄在55至74岁之间，并且在1982-1984年NHEFS时未知的死亡人群。第三次调查，1987年NHEFS，针对的是整个未死亡NHEFS队列。1982-1984年NHEFS包括五个步骤。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。第三阶段是对参与者的访谈或其代理人的访谈。随访的第四阶段包括对受访者的脉搏、血压和体重的测量，第五步是获取相关的医院和养老院记录，包括病理报告和心电图。1986年NHEFS评估了自上次接触期以来NHEFS队列中最年长成员的健康和功能状态的变化。1987年NHEFS也收集了自上次接触期以来NHEFS队列健康和功能状态变化的信息。生存和追踪状态文件包含了关于整个NHEFS队列状态的总括信息。医疗机构记录文件包含了关于住院和养老院住宿报告以及从医疗机构医疗记录中摘录的信息。死亡率数据文件包含了来自所有三次NHEFS调查的死亡证明中摘录的数据。访谈数据文件包含了自NHANES I检查以来关于受试者健康历史选定方面的信息。