The MDQ is a brief screening instrument for bipolar disorder. It asks about the lifetime presence of 10 symptoms of mania, and so is most sensitive for bipolar I disorder.
Created by Drs. Robert M.A. Hirschfeld, Janet B.W. Williams, Robert L. Spitzer and colleagues. The scale has been published by the authors and widely distributed, though Dr. Hirschfeld retains copyright.
Self-report scales are for screening purposes only, and must be interpreted by a qualified health professional in conjunction with clinical assessment. They cannot be used alone for diagnostic or treatment purposes.