A. Symptoms are similar to those of bipolar I disorder, but they are of a lesser magnitude and cycles occur at a faster rate.
B. Patients frequently have coexisting substance abuse
C. One-third of patients develop a severe mood disorder (usually bipolar II).
D. Occupational and interpersonal impairment is frequent and usually a consequence of hypomanic states.
E. Cyclothymic disorder often coexists with borderline personality disorder.
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