Issues in Survey Measurement of Chronic Disability: An Example from the National Long Term Care Survey
Elena A. Erosheva, Toby A. White
The National Long Term Care Survey, a longitudinal study that consisted of the screen and detailed interviews, provides a unique opportunity to illustrate issues in survey measurement of chronic disability. The original intent of the survey was to use a shorter measure of disability status in the screen interview to maximize the yield of disabled cases and then examine those cases with a longer measure in the detailed interview, identifying possible false positive disability cases from the screen. In this article, we show empirically that the intended relationship between the screen and detailed NLTCS disability measures does not hold uniformly the detailed measure provides significantly higher ADL disability estimates than the screen measure, contrary to expectation. We examine whether discrepancies between the two disability measures are associated with certain features of the survey design and respondent-level characteristics, discuss implications of our findings for prevalence estimation, and provide recommendations for disability survey design.
Activities of daily living, instrumental activities of daily living, longitudinal survey, screen interview, survey design, two-phase data collection