National Health and Nutrition Examination Survey I: Epidemiologic Followup Study, 1986

The NHANES I Epidemiologic Followup Study (NHEFS) is a longitudinal study of adults originally examined, measured, and interviewed in 1971-1975 as part of the first National Health and Nutrition Examination Survey (NHANES I). The NHEFS was jointly initiated by the National Center for Health Statistics (NCHS), the National Institute on Aging, and other components of the National Institutes of Health and Public Health Service. The primary purpose of the followup study is to investigate longitudinal relationships between the extensive data on physiological, nutritional, behavioral, and demographic characteristics collected during NHANES I and subsequent morbidity or mortality from specific diseases and conditions. The 1982-1984 wave of data collection for NHEFS followed all medically examined respondents who had been 25 to 74 years in 1971-1975. The 1986 NHEFS wave focused on older members of the NHANES I NHEFS cohorts, those who had been 55-74 years of age at their baseline examinations in 1971-1975 and were not known to be deceased at the time of the 1982-1984 NHEFS. In the 1986 NHEFS, the surviving respondents were 65-89 years of age. Data were collected on changes in vital, health, and functional status and use of health care services that had occurred since the last contact, whether the contact was in 1982-1984 or 1971-1975. The vital and tracing status file documents efforts to trace all subjects who had been 55 years of age and over at NHANES I (N = 5,677) and ascertain their vital status and demographic data. Further data collection was aimed at the 3,980 subjects who were not known to be deceased by 1982-1984. Thirty-minute telephone interviews were conducted with either sample members (N = 2,558) or with proxies for the incapacitated (N = 469) and deceased (N = 581) subjects. Questions were asked on household composition, self-reports of physician-diagnosed medical conditions (with detail on reports of cancer, bone fractures, and non-hospital health facility stays), death if applicable, functional limitations, use of health care facilities, and interviewer observations about the respondent. Items on coronary bypass surgery, pacemaker procedures, and community services utilization were 1986 additions to the NHEFS questionnaire. For those respondents who had not been interviewed in 1982-1984, questions were included on smoking and alcohol use, vision and hearing, exercise and weight, and pregnancy and menstrual history. Health care facility records were abstracted to provide diagnostic and summary information on single or multiple overnight stays in hospitals and nursing homes for 2,021 subjects reporting such stays. Death certificate data, including International Classification of Diseases, 9th Revision codes for multiple causes of death, were added for 661 decedents reported since the 1982-1984 wave, for a total of 2,266 decedents.

国家健康与营养考察调查I期（NHANES I）的流行病学随访研究（NHEFS）是一项对1971-1975年间作为首次国家健康与营养考察调查（NHANES I）的一部分进行过检查、测量和访谈的成年人进行的纵向研究。NHEFS由国家健康统计中心（NCHS）、国家老龄化研究所及美国国立卫生研究院和公共卫生服务署的其他部门共同发起。该随访研究的主要目的是探究NHANES I期间收集的关于生理、营养、行为和人口统计学特征的丰富数据与随后特定疾病和状况的发病率或死亡率之间的纵向关系。1982-1984年的NHEFS数据收集波次追踪了1971-1975年间年龄在25至74岁之间的所有接受过医学检查的受访者。1986年的NHEFS波次专注于NHANES I NHEFS队列中的老年成员，即那些在1971-1975年的基线检查中年龄为55至74岁且截至1982-1984年NHEFS时未被记录为已故的成员。在1986年的NHEFS中，幸存的受访者的年龄为65至89岁。数据收集涵盖了自上次接触以来发生的生活、健康和功能状态的变化以及医疗保健服务的使用情况，无论上次接触是在1982-1984年还是1971-1975年。生命和追踪状态文件记录了追踪所有在NHANES I中年龄55岁及以上的受试者（N = 5,677）并确认其生命状态和人口统计学数据的努力。进一步的数据收集针对的是截至1982-1984年时未被记录为已故的3,980位受试者。对样本成员（N = 2,558）或残疾（N = 469）和已故（N = 581）受试者的代理人进行了30分钟的电话访谈。询问了家庭构成、自报由医生诊断的医疗状况（包括关于癌症、骨骨折和非医院健康设施住院的详细报告）、如适用时的死亡情况、功能限制、医疗保健设施的使用以及访谈者对受访者的观察。关于冠状动脉旁路手术、起搏器手术和社区服务利用的项目是1986年NHEFS问卷中的新增内容。对于在1982-1984年间未曾接受访谈的受访者，还包括了关于吸烟和饮酒、视力与听力、锻炼与体重以及怀孕和月经史的问题。为报告过住院或养老院的2,021位受试者提供了医疗保健设施记录的摘要，以提供关于单次或多夜住院的诊疗和总结信息。对于自1982-1984年波次以来报告的661位死者，增加了死亡证明数据，包括关于多种死亡原因的国际疾病分类第9版代码，总计2,266位死者。