Cohen S B, Burt V L
J Econ Soc Meas. 1985;13(2):125-51.
The National Medical Care Expenditure Survey (NMCES) was characterized by a longitudinal survey design, with data collection targeted to five points in time covering the survey year. Field conditions did not allow for all interviews to be conducted over the targeted time periods. A subset of sampled households (holdovers) were not contacted for a particular wave of the survey and data were gathered at the subsequent time period for the two time intervals that were spanned. National estimates for a representative set of health care utilization and expenditure measures were derived from the sample of holdovers and compared with estimates derived from the respondents with five complete waves of data collection. Controlling for relevant predispositional factors in the estimation of health care utilization and expenditure measures, a test for data collection frequency effect is also considered.
国家医疗支出调查（NMCES）采用纵向调查设计，数据收集针对涵盖调查年份的五个时间点。实地情况不允许在目标时间段内完成所有访谈。一部分抽样家庭（留存样本）在特定调查轮次中未被联系，而是在随后跨越的两个时间段收集了数据。具有代表性的一组医疗保健利用和支出指标的全国估计值来自留存样本，并与通过完整五轮数据收集的受访者得出的估计值进行比较。在估计医疗保健利用和支出指标时控制相关的前置因素，同时也考虑了数据收集频率效应的检验。
