@inproceedings{58ac0515a6b74d5baf0e918fac5337c3,
title = "A comparison of methods to detect postural transitions using a single tri-axial accelerometer",
abstract = "Two algorithms for evaluating postural transitions (PTs) in cohorts of 40 healthy younger and 40 older adults are described and evaluated. The time of sit-to-stand (SiSt) and stand-to-sit (StSi) transitions and their duration were measured with two tri-axial accelerometers, one on the chest and one on the lower back. Each algorithm was optimized for these sensor placements. The first algorithm for sensor placement on the chest used a scalar product and vertical velocity estimates. The second algorithm for sensor placement on the lower back used a vector magnitude and a discrete wavelet transform. Both algorithms performed excellently in PT classification for younger and older adults (>86%). However, the chest based sensor and algorithm were better for estimating transition duration (TD) with ICCs to video analysis ranging from 0.678 to 0.969.",
keywords = "Accelerometry/instrumentation, Adult, Algorithms, Female, Humans, Male, Middle Aged, Movement/physiology, Posture/physiology, Thorax, Wavelet Analysis, Young Adult",
author = "Alan Godfrey and Gillian Barry and John Mathers and Lynn Rochester",
year = "2014",
doi = "10.1109/EMBC.2014.6945053",
language = "English",
volume = "2014",
series = "Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings",
publisher = "IEEE",
pages = "6234--7",
booktitle = "2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society",
address = "United States",
note = "EMBC{\textquoteright}14 - 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society ; Conference date: 26-06-2014",
}