MULTILEVEL FUNCTIONAL PRINCIPAL COMPONENT ANALYSIS

The Sleep Heart Health Study (SHHS) is a comprehensive landmark study of sleep and its impacts on health outcomes. A primary metric of the SHHS is the in-home polysomnogram, which includes two electroencephalographic (EEG) channels for each subject, at two visits. The volume and importance of this d...

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Bibliographic Details
Published in:	The annals of applied statistics Vol. 3; no. 1; p. 458
Main Authors:	Di, Chong-Zhi, Crainiceanu, Ciprian M, Caffo, Brian S, Punjabi, Naresh M
Format:	Journal Article
Language:	English
Published:	United States 01.03.2009
ISSN:	1932-6157
Online Access:	Get more information
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Summary:	The Sleep Heart Health Study (SHHS) is a comprehensive landmark study of sleep and its impacts on health outcomes. A primary metric of the SHHS is the in-home polysomnogram, which includes two electroencephalographic (EEG) channels for each subject, at two visits. The volume and importance of this data presents enormous challenges for analysis. To address these challenges, we introduce multilevel functional principal component analysis (MFPCA), a novel statistical methodology designed to extract core intra- and inter-subject geometric components of multilevel functional data. Though motivated by the SHHS, the proposed methodology is generally applicable, with potential relevance to many modern scientific studies of hierarchical or longitudinal functional outcomes. Notably, using MFPCA, we identify and quantify associations between EEG activity during sleep and adverse cardiovascular outcomes.
ISSN:	1932-6157
DOI:	10.1214/08-AOAS206