| The effect of crossing legs on blood pressure: a randomized single-blind cross-over study. | |
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MedLine Citation:
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PMID: 10450120 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Although there is a theoretical basis for crossing legs to increase blood pressure, there are no published data addressing this question. As a result guidelines for measurement of blood pressure are not consistent in recommending that patients legs should not be crossed during measurement. OBJECTIVE: To determine the effect of crossing legs on blood pressure. METHODS: Fifty healthy volunteers and 53 patients with hypertension were randomly allocated in a study with a cross-over design to having seated blood pressure measured with their legs in three different positions: feet flat on the floor and legs crossed using two common methods. The blood pressures were assessed by an investigator who was blinded to the leg positions and used a fully automated sphygmomanometer. RESULTS: Crossing legs during blood pressure measurement increased systolic (by average 8.1 mmHg, 95% confidence interval 5.1-11.1 mmHg for method 1; 10.5 mmHg, 6.5-14.6 mmHg for method 2) and diastolic (by 4.5 mmHg, 1.5-7.5 mmHg for method 1; 4.0 mmHg, 2.0-6.0 mmHg for method 2) blood pressures in patients who have hypertension. Crossing legs increased systolic blood pressure (by 2.5 mmHg, 1.3)3.8 mmHg for method 1; 2.3 mmHg, 0.9-3.7 mmHg for method 2) in the healthy volunteers but had little effect on diastolic blood pressure. The cardiovascular-risk class increased for a large number of the hypertensive patients but for fewer of the normotensive subjects. CONCLUSIONS: Blood pressure increases when legs are crossed and this increases the estimation of cardiovascular risk for many patients. Care should be taken to ensure that the patients feet are flat on the floor when measuring their blood pressure. |
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Authors:
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G L Peters; S K Binder; N R Campbell |
Publication Detail:
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Type: Clinical Trial; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: Blood pressure monitoring Volume: 4 ISSN: 1359-5237 ISO Abbreviation: Blood Press Monit Publication Date: 1999 Apr |
Date Detail:
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Created Date: 1999-10-12 Completed Date: 1999-10-12 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9606438 Medline TA: Blood Press Monit Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 97-101 Citation Subset: IM |
Affiliation:
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Divisions of General Internal Medicine, Geriatrics and Nephrology, Faculty of Medicine, The University of Calgary, Calgary, Alberta, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Blood Pressure* Blood Pressure Determination* Cross-Over Studies Female Humans Hypertension / physiopathology* Male Middle Aged Posture |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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