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The Bipolar spectrum diagnostic scale (BSDS) is a psychiatric screening rating scale for bipolar disorder.[1] It was developed by Ronald Pies, and was later refined and tested by S. Nassir Ghaemi and colleagues. The BSDS arose from Pies's experience as a psychopharmacology consultant, where he was frequently called on to manage cases of "treatment-resistant depression". Their English version of the scale consists of 19 question items and two sections. The scale was validated in its original version and demonstrated a high sensitivity.[2] In general, instruments for the screening of BD, including the BSDS, have low sensitivity and limited diagnostic validity.[3] See also References
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