Abstract
We describe a novel algorithm for identification of activity/rest periods based on actigraphy signals designed to be used for a proper estimation of ambulatory blood pressure monitoring parameters. Automatic and accurate determination of activity/rest periods is critical in cardiovascular risk assessment applications including the evaluation of dipper versus non-dipper status. The algorithm is based on adaptive rank-order filters, rank-order decision logic, and morphological processing. The algorithm was validated on a database of 104 subjects including actigraphy signals for both the dominant and non-dominant hands (i.e., 208 actigraphy recordings). The algorithm achieved a mean performance above 94.0%, with an average number of 0.02 invalid transitions per 48 h.
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Acknowledgments
This independent investigator-promoted research was funded by unrestricted grants from Ministerio de Ciencia e Innovación (SAF2009-7028-FEDER); Consellería de Economía e Industria, Dirección Xeral de Investigación e Desenvolvemento, Xunta de Galicia (INCITE07-PXI-322003ES; INCITE08-E1R-322063ES; INCITE09-E2R-322099ES; IN845B-2010/114; 09CSA018322PR); and Vicerrectorado de Investigación, University of Vigo.
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Crespo, C., Aboy, M., Fernández, J.R. et al. Automatic identification of activity–rest periods based on actigraphy. Med Biol Eng Comput 50, 329–340 (2012). https://doi.org/10.1007/s11517-012-0875-y
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DOI: https://doi.org/10.1007/s11517-012-0875-y