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Thursday, August 29, 2013

BIOMARKERS FAIL TO DIAGNOSE PARKINSON'S DISEASE

13th August 2013 - New research


BMC Neurology [2013] Apr 12 [Epub ahead of print] (D.J.McGhee, P.L.Royle, P.A.Thompson, D.E.Wright, J.P.Zajicek, C.E.Counsell) 

It had previously been assumed that biomarkers could be an effective means of diagnosing Parkinson's Disease. However, an evaluation of all the methods assessed suggest that the use of biomarkers is insufficient. A biomarker is a substance used as an indicator of a biological state or illness.

A systematic review was undertaken to determine which biomarkers for disease progression in Parkinson's Disease exist. 183 studies were included. The sensitivity of the tests was an average of 71%, which is insufficient for Parkinson's Disease diagnosis. However, the range in sensitivity was between 51% and 86% showing that some of the methods were closer to having a practical use but were still less accurate than other methods of diagnosing Parkinson's Disease that are available. The authors found insufficient evidence to recommend the use of any biomarker for assessing disease progression in Parkinson's Disease clinical trials. They believe that this may simply reflect the poor quality of research in this area. They therefore present a provisional 'roadmap' for conducting future disease progression biomarker studies and recommend new quality criteria by which future studies may be judged.

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