Forthofer R N
Am J Epidemiol. 1983 Apr;117(4):507-15. doi: 10.1093/oxfordjournals.aje.a113568.
In the second National Health and Nutrition Examination Survey (NHANES II), there was a 27% nonresponse rate in the examination phase. This report investigates the potential bias in these data due to this large nonresponse rate. Data from a household and medical history interview are used in the investigation of factors related to examination status. In addition, data from the examined group are compared to data from the 1976 National Health Interview Survey (NHIS). Since there was only a 3.7% nonresponse rate for the 1976 NHIS, proportions calculated from these data represent reasonable estimates of the true population values. Several variables have a significant association with the interview and examination status. However, it appears that the nonresponse and poststratification adjustments performed by the National Center for Health Statistics have removed most of these factors as sources of bias. There is excellent agreement in the marginal distribution of variables between NHANES II for examined persons and the 1976 NHIS.
在第二次全国健康与营养检查调查（NHANES II）中，检查阶段的无应答率为27%。本报告调查了由于这一高无应答率导致的数据潜在偏差。在调查与检查状态相关的因素时，使用了来自家庭和病史访谈的数据。此外，将已检查组的数据与1976年全国健康访谈调查（NHIS）的数据进行了比较。由于1976年NHIS的无应答率仅为3.7%，根据这些数据计算出的比例代表了对真实总体值的合理估计。几个变量与访谈和检查状态有显著关联。然而，国家卫生统计中心进行的无应答和事后分层调整似乎已消除了这些因素作为偏差来源的大部分影响。已检查人员的NHANES II与1976年NHIS之间变量的边际分布有极佳的一致性。
