Predictive value of the ankle-brachial index in the evaluation of intermittent claudication

• Autor(a) principal: Wolosker,Nelson
• Data de Publicação: 2000
• Outros Autores: Rosoky,Ruben A, Nakano,Lívio, Basyches,Márcio, Puech-Leão,Pedro
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista do Hospital das Clínicas
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0041-87812000000200005
• topic: Intermittent claudication; Risk factors; Diagnostic; Atherosclerosis; Complications

The purpose of this study was to determine whether the ankle-brachial index (ABI) could be used to predict the prognosis for a patient with intermittent claudication (IC). We studied 611 patients prospectively during 28 months of follow-up. We analyzed the predictive power of using various levels of ABI - 0.30 to 0.70 at 0.05 increments - in terms of the measure's specificity (association with a favorable outcome after exercise rehabilitation therapy) and sensitivity (association with a poor outcome after exercise rehabilitation therapy). We found that using an ABI of 0.30 as a cut-off value produced the lowest margin of error overall, but the predictive power was still low with respect to identifying the patients with a poor prognosis after non-aggressive therapeutic treatment. Further study is needed to perhaps identify a second factor that could increase the sensitivity of the test.