Journal article
Statistical inference for streamed longitudinal data
Biometrika, Vol.110(4), pp.841-858
11/15/2023
DOI: 10.1093/biomet/asad010
Abstract
Modern longitudinal data, for example from wearable devices, may consist of measurements of biological signals on a fixed set of participants at a diverging number of time-points. Traditional statistical methods are not equipped to handle the computational burden of repeatedly analysing the cumulatively growing dataset each time new data are collected. We propose a new estimation and inference framework for dynamic updating of point estimates and their standard errors along sequentially collected datasets with dependence, both within and between the datasets. The key technique is a decomposition of the extended inference function vector of the quadratic inference function constructed over the cumulative longitudinal data into a sum of summary statistics over data batches. We show how this sum can be recursively updated without the need to access the whole dataset, resulting in a computationally efficient streaming procedure with minimal loss of statistical efficiency. We prove consistency and asymptotic normality of our streaming estimator as the number of data batches diverges, even as the number of independent participants remains fixed. Simulations demonstrate the advantages of our approach over traditional statistical methods that assume independence between data batches. Finally, we investigate the relationship between physical activity and several diseases through analysis of accelerometry data from the National Health and Nutrition Examination Survey.
Details
- Title: Subtitle
- Statistical inference for streamed longitudinal data
- Creators
- Lan Luo - University of IowaJingshen Wang - University of California, BerkeleyEmily C. Hector - North Carolina State University
- Resource Type
- Journal article
- Publication Details
- Biometrika, Vol.110(4), pp.841-858
- Publisher
- Oxford Univ Press
- DOI
- 10.1093/biomet/asad010
- ISSN
- 0006-3444
- eISSN
- 1464-3510
- Number of pages
- 18
- Language
- English
- Electronic publication date
- 02/20/2023
- Date published
- 11/15/2023
- Academic Unit
- Statistics and Actuarial Science
- Record Identifier
- 9984399639802771
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