- Title
- Toe brachial index measured by automated device compared to duplex ultrasonography for detecting peripheral arterial disease in older people
- Creator
- Sonter, Jennifer; Tehan, Peta; Chuter, Vivienne
- Relation
- Vascular Vol. 25, Issue 6, p. 612-617
- Publisher Link
- http://dx.doi.org/10.1177/1708538117705293
- Publisher
- Sage
- Resource Type
- journal article
- Date
- 2017
- Description
- Introduction: To investigate the diagnostic accuracy of an automated toe blood pressure device for detecting peripheral arterial disease in older people. Methods: Ninety participants underwent toe and brachial blood pressure measurements and colour duplex ultrasonography of the right lower limb. Peripheral arterial disease was diagnosed if > 50% arterial obstruction was identified in any lower limb vessel using colour duplex ultrasonography. A receiver operating characteristic curve was analysed and the sensitivity and specificity of commonly used toe brachial index and toe blood pressure values were determined. Results: The optimum toe brachial index threshold value for diagnosing peripheral arterial disease was 0.72 (sensitivity 76.2%, specificity 75%). The area under the curve was 0.829 (95% CI 0.743 to 0.915, p < 0.0001) suggesting fair diagnostic accuracy. A toe blood pressure of 70 mmHg was found to have excellent specificity (97.92%) for detecting PAD but poor sensitivity (42.86%). Conclusions: The accuracy of automated toe blood pressure and TBI measurements was determined to be good when using colour duplex ultrasound as the reference standard for the non-invasive diagnosis of peripheral arterial disease. Results should be interpreted in the context of all clinical signs and symptoms.
- Subject
- sensitivity; specificity; diagnostic accuracy; toe-brachial index; peripheral arterial disease; lower extremity arterial disease
- Identifier
- http://hdl.handle.net/1959.13/1387344
- Identifier
- uon:32590
- Identifier
- ISSN:1708-5381
- Language
- eng
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