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Mi-P1: Sesión de pósteres I
Lugar: Zona pósteres

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Presentación 12

Characterization of High-Resolution Sleep Position in Adolescents with Smartphone Accelerometers

Yolanda Castillo Escario^1,2,3, Raimon Jané^1,2,3

1: Institut de Bioenginyeria de Catalunya (IBEC), España; 2: Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN); 3: Universitat Politècnica de Catalunya (UPC)

Sleep position has an impact on sleep quality and the risk and severity of several diseases. Classical methods to measure sleep position are complex, expensive, and difficult to use outside the laboratory. Wearables and smartphones can help to address these issues to track sleep position in free-living conditions. Here, we monitor high-resolution sleep position in a large sample of adolescents (N=145) over several nights (1-9) using smartphone accelerometers. This study was part of the Research, Creation and Service program, a citizen science project by IBEC and the Education Department of the Government of Catalonia. We aim to investigate the distribution of sleep positions and position changes in adolescents and propose new measures related to nocturnal body movements.

We developed a new index, the mean sleep angle change per hour, and compared it with classical measures, such as the number of position shifts per hour. Our results indicate that, overall, participants spent 49% of the time on the side (25% right, 24% left), 36% in supine, and 15% in prone position. This is a higher amount of time in supine and less in prone than children (3-12 years old), but more time in prone and less on the side than adults. Moreover, adolescents moved more than adults during sleep according to all measures.

In conclusion, this work systematically analyzes sleep position over several nights in adolescents, a largely unstudied population, and offers a new tool for monitoring high-resolution sleep position in a simple and cost-effective way.