{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T18:12:46Z","timestamp":1788286366812,"version":"build-2803163510"},"reference-count":31,"publisher":"JMIR Publications Inc.","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JMIR Form Res"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec sec-type=\"background\">\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Respiratory inductance plethysmography (RIP) belts are the standard for measuring thoracoabdominal movements in home sleep apnea testing (HSAT), but are often cumbersome and power-intensive.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"objective\">\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>This study aimed to characterize abdominal movement signals measured by a wireless, single-point, abdomen-worn sensor to evaluate the sensor\u2019s capability to track respiratory dynamics.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"methods\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Overnight recordings were obtained from 37 participants using a wireless abdomen-worn sensor and a thoracic RIP belt during HSAT. The abdominal movement signal was analyzed for breath detection, respiratory rate (RR) estimation, and waveform similarity relative to the RIP signal. Factors influencing the agreement between the 2 signals were also investigated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"results\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Data from 34 participants were analyzed. The abdominal movement signal showed moderate agreement with the thoracic RIP signal, achieving a sensitivity of 82.44%, a positive predictive value of 76.22%, and an\n                      <jats:italic>F<\/jats:italic>\n                      <jats:sub>1<\/jats:sub>\n                      -score of 78.99% for breath-cycle detection. RR estimation yielded a mean absolute percentage error of 5.42% and limits of agreement of \u00b13 breaths per minute (bpm). Morphological similarity was moderate, with an average distance correlation of 0.73 and a mean squared error of 0.64. The agreement between the 2 signals declined with increasing respiratory event severity.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"conclusions\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Compared with a standard thoracic RIP belt, the single-point, wireless, abdomen-worn sensor tracked basic respiratory metrics and waveform morphology with moderate agreement. These findings show promising baseline performance and suggest its viability as a simplified, low-profile data-acquisition platform for home-based respiratory monitoring.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2196\/93351","type":"journal-article","created":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T17:13:32Z","timestamp":1788282812000},"page":"e93351-e93351","source":"Crossref","is-referenced-by-count":0,"title":["Characteristics of Abdominal Movement Signals Measured by a Wireless Abdomen-Worn Sensor During Home Sleep Apnea Testing: Pilot Observational Study"],"prefix":"10.2196","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-1338-9587","authenticated-orcid":false,"given":"Thi Hang","family":"Dang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-9663-1820","authenticated-orcid":false,"given":"Nam-Hwan","family":"Sung","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-1213-7161","authenticated-orcid":false,"given":"Hyung-ki","family":"Min","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6883-2773","authenticated-orcid":false,"given":"Seongmun","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2947-6999","authenticated-orcid":false,"given":"Heein","family":"Yoon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9582-295X","authenticated-orcid":false,"given":"Franklin","family":"Bien","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1010","published-online":{"date-parts":[[2026,9,1]]},"reference":[{"issue":"6","key":"R1","doi-asserted-by":"publisher","first-page":"608","DOI":"10.1016\/j.jacc.2021.05.048","article-title":"Sleep disordered breathing and cardiovascular disease: JACC state-of-the-art review","volume":"78","author":"Cowie","journal-title":"J Am Coll Cardiol"},{"issue":"3","key":"R2","doi-asserted-by":"publisher","first-page":"e56","DOI":"10.1161\/CIR.0000000000000988","article-title":"Obstructive sleep apnea and cardiovascular disease: a scientific statement from the American Heart Association","volume":"144","author":"Yeghiazarians","journal-title":"Circulation"},{"issue":"3","key":"R3","doi-asserted-by":"publisher","first-page":"261","DOI":"10.5664\/jcsm.27191","article-title":"Obstructive sleep apnea and cardiovascular disease: role of the metabolic syndrome and its components","volume":"4","author":"Jean-Louis","journal-title":"J Clin Sleep Med"},{"issue":"1","key":"R4","first-page":"60","volume":"121","author":"Hussein","journal-title":"Mo Med"},{"issue":"3","key":"R5","doi-asserted-by":"publisher","first-page":"479","DOI":"10.5664\/jcsm.6506","article-title":"Clinical practice guideline for diagnostic testing for adult obstructive sleep apnea: an American Academy of Sleep Medicine clinical practice guideline","volume":"13","author":"Kapur","journal-title":"J Clin Sleep Med"},{"issue":"6","key":"R6","doi-asserted-by":"publisher","first-page":"e11","DOI":"10.1164\/rccm.202101-0190ST","article-title":"Research priorities for patients with heart failure and central sleep apnea. 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