FURTHER STUDY OF SCHELLONG TESTING IN 152 YOUNG FEMALES

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Orthostatic dysregulation (OD) generally implies a systemic condition indicating poor circulatory function resulting from autonomic imbalance, which usually appears in a rather young population at or around puberty, predominantly in females. This condition can be recognized from the results of a questionnaire which has been proposed and prepared by the Pediatric OD Study Group of Japan as diagnostic criteria for OD. Schellong testing has also been developed as a screening method to determine OD or orthostatic hypotension.<BR>We carried out a survey and analyzed data collected with the questionnaire and Schellong test results among 152 young normal females ranging in age from 18 to 21 years in order to obtain the actual prevalence of OD in these subjects.<BR>Among 152 young normal females, 39 (25.7%) were confirmed to have OD based on the questionnaire. Although orthostatic dizziness was relatively common in this series of young females, regardless of the presence or absence of OD (90/152, 59.2%), this symptom, which is listed as one of the 5 major items on the questionnaire, was much more prevalent in subjects with OD (37/39, 94.9%). Similar prevalence patterns for fatigability or unexplained tiredness were also found in subjects with OD (28/39, 71.8%) when compared with total subjects (55/152, 36.2%).<BR>As for the positive rate of the Schellong test, subjects with and without OD showed 33.3% and 31.3%, respectively, and this difference was not statistically significant. There was, however, a highly significant difference in the fall in systolic pressure during the Schellong test procedure between subjects without OD and 10 subjects with OD in whom orthostatic dizziness frequently occurred.<BR>Although it is often said that the clinical value of the Schellong test for assessing OD and other related conditions may be questionable because of its relatively poor specificity, our impression was that this test procedure may still be useful and applicable to assessment of OD or autonomic nerve dysfunction as a screening measure, since the test has the advantage of being simple enough to carry out in clinical practice.
社団法人日本耳鼻咽喉科学会の論文

FURTHER STUDY OF SCHELLONG TESTING IN 152 YOUNG FEMALES

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