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Paper · 2602.20611 · 2026

Amortized Bayesian inference for actigraph time sheet data from mobile devices

Daniel Zhou, Sudipto Banerjee

arXiv · PDF · Open in the Atlas

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sample_approximator Not yet run Daniel-Zhou-93/Amortized-Bayesian-Inference-on-Actigraph-Data/src/utils/sample_approximator.py
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Abstract

Mobile data technologies use "actigraphs" to furnish information on health variables as a function of a subject's movement. The advent of wearable devices and related technologies has propelled the creation of health databases consisting of human movement data to conduct research on mobility patterns and health outcomes. Statistical methods for analyzing high-resolution actigraph data depend on the specific inferential context, but the advent of Artificial Intelligence (AI) frameworks require that the methods be congruent to transfer learning and amortization. This article devises amortized Bayesian inference for actigraph time sheets. We pursue a Bayesian approach to ensure full propagation of uncertainty and its quantification using a hierarchical dynamic linear model. We build our analysis around actigraph data from the Physical Activity through Sustainable Transport Approaches in Los Angeles (PASTA-LA) study conducted by the Fielding School of Public Health in the University of California, Los Angeles. Apart from achieving probabilistic imputation of actigraph time sheets, we are also able to statistically learn about the timevarying impact of explanatory variables on the magnitude of acceleration (MAG) for a cohort of subjects.

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