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Table 1 Some key boundaries in Bipolar Spectrum Disorders. The table lists some of the important diagnostic boundaries in bipolar spectrum disorders and the criteria used in making diagnostic decisions at these boundaries.

From: The Bipolar Affective Disorder Dimension Scale (BADDS) – a dimensional scale for rating lifetime psychopathology in Bipolar spectrum disorders

Boundary Criteria on which decision based
Major Depression (with Sub-clinical hypomanias) v. Bipolar II Disorder Number and duration of hypomanic-like symptoms
Bipolar I v. Bipolar II Disorder Impairment and duration
Bipolar I v. Schizoaffective Disorder, Bipolar Type Occurrence and timing of psychotic symptoms
Schizophrenia v. Schizoaffective Disorder, Bipolar Type Balance of psychotic and affective symptoms