Accuracy of assessment instruments for patients' competence to consent to medical treatment or research.

Reason for Withdrawal This review has been withdrawn as the Diagnostic Test Accuracy (DTA) editorial team deem that it does not fit the DTA paradigm, and therefore is not suitable for publication in the Cochrane Library. The main reason for this is that their is currently no clear diagnostic gold standard to compare the reviewed diagnostic tests to, making it impossible to assess sensitivity and specificity of measures. To view the published versions of this article, please click the 'Other versions' tab.