For at least 2 years (at least 1 year in children and adolescents) there have been numerous periods with hypomanie symptoms that do not meet criteria for a hypomanieepisode and numerous periods with depressive symptoms that do not meet criteria fora major depressive episode.B. During the above 2-year period (1 year in children and adolescents), the hypomanieand depressive periods have been present for at least half the time and the individualhas not been without the symptoms for more than 2 months at a time.C. Criteria for a major depressive, manic, or hypomanie episode have never been met.D. The symptoms in Criterion A are not better explained by schizoaffective disorder,schizophrenia, schizophreniform disorder, delusional disorder, or other specified or unspecified schizophrenia spectrum and other psychotic disorder.E. The symptoms are not attributable to the physiological effects of a substance (e.g., adrug of abuse, a medication) or another medical condition (e.g., hyperthyroidism).