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This study investigates end\u2010tidal carbon dioxide (<jats:styled-content style=\"fixed-case\">ETCO<jats:sub>2<\/jats:sub><\/jats:styled-content>), respiratory rate (<jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content>), and heart rate variability (<jats:styled-content style=\"fixed-case\">HRV<\/jats:styled-content>) in adolescent girls with emotional disorders and healthy controls. <jats:styled-content style=\"fixed-case\">ETCO<jats:sub>2<\/jats:sub><\/jats:styled-content>, <jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content>, <jats:styled-content style=\"fixed-case\">HRV<\/jats:styled-content>, and ratings of emotional symptom severity were collected in adolescent female psychiatric patients with emotional disorders (<jats:italic>n<\/jats:italic>\u2009=\u200963) and healthy controls (<jats:italic>n<\/jats:italic>\u2009=\u200962). <jats:styled-content style=\"fixed-case\">ETCO<jats:sub>2<\/jats:sub><\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content> differed significantly between patients and controls. <jats:styled-content style=\"fixed-case\">ETCO<jats:sub>2<\/jats:sub><\/jats:styled-content>, <jats:styled-content style=\"fixed-case\">HR<\/jats:styled-content>, and <jats:styled-content style=\"fixed-case\">HRV<\/jats:styled-content> were significant independent predictors of group status, that is, clinical or healthy, while <jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content> was not. <jats:styled-content style=\"fixed-case\">ETCO<jats:sub>2<\/jats:sub><\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content> were significantly related to emotional symptom severity and to <jats:styled-content style=\"fixed-case\">HRV<\/jats:styled-content> in the total group. <jats:styled-content style=\"fixed-case\">ETCO<jats:sub>2<\/jats:sub><\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content> were not affected by use of selective serotonin reuptake inhibitors. It is concluded that emotional dysregulation is related to hyperventilation in adolescent girls. Respiratory\u2010based treatments may be relevant to investigate in future research.<\/jats:p>","DOI":"10.1111\/psyp.12188","type":"journal-article","created":{"date-parts":[[2014,2,27]],"date-time":"2014-02-27T07:54:42Z","timestamp":1393487682000},"page":"412-418","source":"Crossref","is-referenced-by-count":21,"title":["Adolescent girls with emotional disorders have a lower end\u2010tidal <scp><scp>CO<sub>2<\/sub><\/scp><\/scp> and increased respiratory rate compared with healthy controls"],"prefix":"10.1111","volume":"51","author":[{"given":"Eva","family":"Henje Blom","sequence":"first","affiliation":[{"name":"Department of Clinical Neuroscience Karolinska Institutet  Stockholm Sweden"},{"name":"Osher Center for Integrative Medicine Karolinska Institutet  Stockholm Sweden"},{"name":"Department of Psychiatry University of California San Francisco  San Francisco USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eva","family":"Serlachius","sequence":"additional","affiliation":[{"name":"Department of Clinical Neuroscience Karolinska Institutet  Stockholm Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Margaret A.","family":"Chesney","sequence":"additional","affiliation":[{"name":"Osher Center for Integrative Medicine University of California San Francisco  San Francisco USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Erik M. 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