{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,7]],"date-time":"2026-02-07T01:25:06Z","timestamp":1770427506462,"version":"3.49.0"},"reference-count":0,"publisher":"European Respiratory Society (ERS)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur Respir J"],"published-print":{"date-parts":[[1999,2,1]]},"abstract":"<jats:p>Craniofacial and upper airway anatomy, obesity and posture may all play a role in compromising upper airway patency in patients with the sleep apnoea\/hypopnoea syndrome. The aim of this study was to investigate the relationship between obesity, facial structure and severity of sleep-disordered breathing using lateral cephalometric measurements and to assess the effect of body posture on cephalometric measurements of upper airway calibre variables in obese and non-obese subjects. Lateral cephalometry was carried out in erect and supine postures in 73 awake male subjects randomly selected from patients referred for polysomnography who had a wide range of apnoea\/hypopnoea frequencies (1-131 events x h sleep(-1)). Subjects were divided into non-obese (body mass index (BMI) &lt; 30 kg x m(-2); n=42) and obese (BMI &gt; or = 30 kg x m(-2); n=31) groups. Significant but weak correlations were found between apnoea\/hypopnoea index (AHI) and measurements reflecting upper airway dimensions: uvular protrusion-posterior pharyngeal wall (r=-0.26, p&lt;0.05) and hyoid-posterior pharyngeal wall (r=0.26, p&lt;0.05). Multiple regression using both upper airway dimensions improved the correlation to AHI (r=0.34, p=0.01). Obese subjects had greater hyoid-posterior pharyngeal wall distances than non-obese subjects, both erect (42+\/-5 versus 39+\/-4 mm, respectively (mean+\/-SD) p&lt;0.01) and supine (43+\/-5 versus 40+\/-4 mm, p&lt;0.05). Skeletal craniofacial structure was similar in obese and non-obese subjects. In conclusion, measurements reflecting upper airway size were correlated with the severity of sleep-disordered breathing. Differences in upper airway size measurements between obese and non-obese subjects were independent of bony craniofacial structure.<\/jats:p>","DOI":"10.1183\/09031936.99.13239899","type":"journal-article","created":{"date-parts":[[2002,8,26]],"date-time":"2002-08-26T15:02:27Z","timestamp":1030374147000},"page":"398-402","source":"Crossref","is-referenced-by-count":31,"title":["Effect of obesity and erect\/supine posture on lateral cephalometry: relationship to sleep-disordered breathing"],"prefix":"10.1183","volume":"13","author":[{"given":"PE","family":"Brander","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"IL","family":"Mortimore","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"NJ","family":"Douglas","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"81","published-online":{"date-parts":[[1999,2,1]]},"container-title":["European Respiratory Journal"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1183\/09031936.99.13239899","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,2,24]],"date-time":"2025-02-24T06:18:37Z","timestamp":1740377917000},"score":1,"resource":{"primary":{"URL":"https:\/\/publications.ersnet.org\/lookup\/doi\/10.1183\/09031936.99.13239899"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1999,2,1]]},"references-count":0,"journal-issue":{"issue":"2","published-online":{"date-parts":[[1999,2,1]]},"published-print":{"date-parts":[[1999,2,1]]}},"alternative-id":["10.1183\/09031936.99.13239899"],"URL":"https:\/\/doi.org\/10.1183\/09031936.99.13239899","relation":{},"ISSN":["0903-1936","1399-3003"],"issn-type":[{"value":"0903-1936","type":"print"},{"value":"1399-3003","type":"electronic"}],"subject":[],"published":{"date-parts":[[1999,2,1]]}}}