{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:09:16Z","timestamp":1760058556645,"version":"build-2065373602"},"reference-count":53,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2025,4,7]],"date-time":"2025-04-07T00:00:00Z","timestamp":1743984000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Children"],"abstract":"<jats:p>Objectives: The current study aims to investigate the factors associated with the severity of conditions for pediatric cases with postural orthostatic tachycardia syndrome (POTS). Methods: Patients hospitalized and first diagnosed with POTS were retrospectively included and reviewed. The severity of symptoms was evaluated by symptom scores (SSs). Multiple Spearman correlation analyses and multiple linear regression analyses were used to determine factors independently associated with SS. Patients were divided into the mild (SS \u2264 P25) and severe (SS \u2265 P75) groups to test the distinguishing efficiency of the candidate factors. The efficiency of each independently correlated factor in indicating the condition of children with POTS was assessed by the receiver operating characteristic (ROC) curve. Results: A series of 296 pediatric patients aged 5\u201317 years suffering from POTS were included. Multiple Spearman correlation analyses and multiple linear regression analyses showed that corrected QT interval dispersion (QTcd) was independently correlated with SS (p &lt; 0.05). QTcd can be used to suggest the severity of POTS symptoms, and the area under the curve (AUC) was 0.986 (95% CI 0.976\u20130.997). At a threshold of QTcd = 45 ms, the sensitivity and specificity were, respectively, 94.0% and 91.8% for symptom severity indication. Conclusions: In pediatric cases with POTS, QTcd was positively correlated with their symptom severity and exhibited a strong indicative value. A QTcd of 45 ms was a valid cut-off value for indicating symptom severity.<\/jats:p>","DOI":"10.3390\/children12040474","type":"journal-article","created":{"date-parts":[[2025,4,8]],"date-time":"2025-04-08T05:59:00Z","timestamp":1744091940000},"page":"474","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Analysis of Factors Relevant to the Severity of Symptoms in Children and Adolescents with Postural Orthostatic Tachycardia Syndrome"],"prefix":"10.3390","volume":"12","author":[{"given":"Yali","family":"Cao","sequence":"first","affiliation":[{"name":"Department of Pediatrics, Children\u2019s Medical Center, Peking University First Hospital, Beijing 102627, China"},{"name":"Department of Cardiology, Children\u2019 Hospital of Hebei Province, Shijiazhuang 050031, China"},{"name":"Hebei Provincial Key Laboratory of Pediatric Cardiovascular Disease, Shijiazhuang 050031, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ping","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Children\u2019s Medical Center, Peking University First Hospital, Beijing 102627, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bo","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Children\u2019 Hospital of Hebei Province, Shijiazhuang 050031, China"},{"name":"Hebei Provincial Key Laboratory of Pediatric Cardiovascular Disease, Shijiazhuang 050031, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yingqian","family":"Zhang","sequence":"additional","affiliation":[{"name":"Hebei Provincial Key Laboratory of Pediatric Cardiovascular Disease, Shijiazhuang 050031, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junbao","family":"Du","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Children\u2019s Medical Center, Peking University First Hospital, Beijing 102627, China"},{"name":"State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing 100191, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongfang","family":"Jin","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Children\u2019s Medical Center, Peking University First Hospital, Beijing 102627, China"},{"name":"State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing 100191, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6182-3110","authenticated-orcid":false,"given":"Ying","family":"Liao","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Children\u2019s Medical Center, Peking University First Hospital, Beijing 102627, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,7]]},"reference":[{"key":"ref_1","first-page":"456","article-title":"Management of Postural Orthostatic Tachycardia Syndrome in Pediatric Patients: A Clinical Review","volume":"29","author":"Huynh","year":"2024","journal-title":"J. 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