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Accuracy of ankle-brachial index obtained by automated blood pressure measuring devices in patients with diabetes mellitus.
MedLine Citation:
PMID:  21397352     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Upper arm automated blood pressure devices are widely available and could be used to estimate the ankle-brachial index. METHODS: We conducted a trial to determine the equivalence of ankle-brachial index estimated by an upper arm blood pressure measuring device as index method compared to the handheld Doppler method as the reference standard. A total of 110 patients with diabetes mellitus were sequentially examined by two methods. RESULTS: The prevalence of peripheral arterial disease was 32%. The index method obtained valid measurements in 104 (95%) patients. Ankle-brachial index was lower with the index method compared to the reference standard (mean difference: -0.05; 95% confidence interval [CI]: -0.50 to 0.39). This confidence interval was above the boundaries clinically established as equivalence margins in our study. The kappa agreement between two methods was 0.45. The performance of the index method was: sensitivity: 67%; specificity: 87%; positive likelihood ratio: 5.25; negative likelihood ratio: 0.18; positive predictive value: 71%; negative predictive value: 85%; and the area under the receiving operating characteristic curve: 0.87 (95% CI: 0.78-0.93). CONCLUSION: Upper arm automated blood pressure measuring devices cannot replace the handheld Doppler method to estimate the ankle-brachial index in patients with diabetes mellitus.
Authors:
Javier Ena; Teresa Lozano; Gema Verdú; Carlos R Argente; Victor L González
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-10
Journal Detail:
Title:  Diabetes research and clinical practice     Volume:  -     ISSN:  1872-8227     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508335     Medline TA:  Diabetes Res Clin Pract     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Department of Internal Medicine, Division of General Internal Medicine, Hospital Marina Baixa, Villajoyosa, Alicante, Spain.
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