Investigators from University of Rostock Report New Data on Dementia (Left-truncated Health Insurance Claims Data: Theoretical Review and Empirical Application): Neurodegenerative Diseases and Conditions – Dementia

2023 MAR 29 (NewsRx) -- By a News Reporter-Staff News Editor at Insurance Daily News -- Investigators publish new report on Neurodegenerative Diseases and Conditions - Dementia. According to news reporting originating from Rostock, Germany, by NewsRx correspondents, research stated, “From the inventory of the health insurer AOK in 2004, we draw a sample of a quarter million people and follow each person’s health claims continuously until 2013. Our aim is to estimate the effect of a stroke on the dementia onset probability for Germans born in the first half of the 20th century.”

Financial supporters for this research include German Research Foundation (DFG), AOK Research Institute.

Our news editors obtained a quote from the research from the University of Rostock, “People deceased before 2004 are randomly left-truncated, and especially their number is unknown. Filtrations, modelling the missing data, enable circumventing the unknown number of truncated persons by using a conditional likelihood. Dementia onset after 2013 is a fixed right-censoring event. For each observed health history, Jacod’s formula yields its conditional likelihood contribution. Asymptotic normality of the estimated intensities is derived, related to a sample size definition including the number of truncated people. The standard error results from the asymptotic normality and is easily computable, despite the unknown sample size. The claims data reveal that after a stroke, with time measured in years, the intensity of dementia onset increases from 0.02 to 0.07. Using the independence of the two estimated intensities, a 95% confidence interval for their difference is [0.053, 0.057].”

According to the news editors, the research concluded: “The effect halves when we extend the analysis to an age-inhomogeneous model, but does not change further when we additionally adjust for multi-morbidity.”

This research has been peer-reviewed.

For more information on this research see: Left-truncated Health Insurance Claims Data: Theoretical Review and Empirical Application. AStA Advances in Statistical Analysis, 2023. AStA Advances in Statistical Analysis can be contacted at: Springer, One New York Plaza, Suite 4600, New York, Ny, United States. (Springer - www.springer.com; AStA Advances in Statistical Analysis - http://www.springerlink.com/content/1863-8171/)

The news editors report that additional information may be obtained by contacting Rafael Weissbach, University of Rostock, Chair Stat & Econometr, Univ Pl 1, D-18055 Rostock, Germany. Additional authors for this research include Achim Doerre, Dominik Wied, Gabriele Doblhammer and Anne Fink.

The direct object identifier (DOI) for that additional information is: https://doi.org/10.1007/s10182-023-00471-1. This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.

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