The definitions given below are from Diagnostic and Statistical Manual of Mental
Disorders, Fourth Edition, 1994 (American Psychiatric Association, 1400 K Street NW,
Suite 1101, Washington, DC 20005-2403 USA).
The essential feature of Bipolar I Disorder is a clinical course that is characterized
by the occurrence of one or more Manic Episodes or Mixed Episodes. Often individuals have
also had one or more Major Depressive Episodes. Episodes of Substance-Induced Mood
Disorder (due to the direct effects of a medication, or other somatic treatments for
depression, a drug of abuse, or toxin exposure) or of Mood Disorder Due to a General
Medical Condition do not count toward a diagnosis of Bipolar I Disorder. In addition, the
episodes are not better accounted for by Schizoaffective Disorder and are not superimposed
on Schizophrenia, Schizophreniform Disorder, Delusional Disorder, or Psychotic Disorder
Not Otherwise Specified. . . .
Bipolar II Disorder--Diagnostic Features (DSM-IV, p. 359)
The essential feature of Bipolar II Disorder is a clinical course that is
characterized by the occurrence of one or more Major Depressive Episodes accompanied by at
least one Hypomanic Episode. Hypomanic Episodes should not be confused with the several
days of euthymia that may follow remission of a Major Depressive Episode. Episodes of
Substance- Induced Mood Disorder (due to the direct effects of a medication, or other
somatic treatments for depression, a drug of abuse, or toxin exposure) or of Mood Disorder
Due to a General Medical Condition do not count toward a diagnosis of Bipolar I Disorder.
In addition, the episodes are not better accounted for by Schizoaffective Disorder and are
not superimposed on Schizophrenia, Schizophreniform Disorder, Delusional Disorder, or
Psychotic Disorder Not Otherwise Specified. . . .
Criteria for Major Depressive Episode (DSM-IV, p. 327)
A. Five (or more) of the following symptoms have been present during the same 2-week
period and represent a change from previous functioning; at least one of the symptoms is
either (1) depressed mood or (2) loss of interest or pleasure.
Note: Do not include symptoms that are clearly due to a general medical condition, or
mood-incongruent delusions or hallucinations.
depressed mood most of the day, nearly every day, as indicated by either subjective
report (e.g., feels sad or empty) or observation made by others (e.g. appears tearful).
Note: In children and adolescents, can be irritable mood.
markedly diminished interest or pleasure in all, or almost all, activities most of
the day, nearly every day (as indicated by either subjective account or observation made
by others)
significant weight loss when not dieting or weight gain (e.g., a change of more than
5% of body weight in a month), or decrease or increase in appetite nearly every day. Note:
In children, consider failure to make expected weight gains.
insomnia or hypersomnia nearly every day
psychomotor agitation or retardation nearly every day (observable by others, not
merely subjective feelings of restlessness or being slowed down)
fatigue or loss of energy nearly every day
feelings of worthlessness or excessive or inappropriate guilt (which may be
delusional) nearly every day (not merely self-reproach or guilt about being sick)
diminished ability to think or concentrate, or indecisiveness, nearly every day
(either by subjective account or as observed by others)
recurrent thoughts of death (not just fear of dying), recurrent suicidal ideation
without a specific plan, or a suicide attempt or a specific plan for committing suicide
B. The symptoms do not meet criteria for a Mixed Episode.
C. The symptoms cause clinically significant distress or impairment in social,
occupational, or other important areas of functioning.
D. The symptoms are not due to the direct physiological effects of a substance (e.g.,
a drug of abuse, a medication) or a general medical condition (e.g., hypothyroidism).
E. The symptoms are not better accounted for by bereavement, i.e., after the loss of a
loved one, the symptoms persist for longer than 2 months or are characterized by marked
functional impairment, morbid preoccupation with worthlessness, suicidal ideation,
psychotic symptoms, or psychomotor retardation.
Criteria for Manic Episode (DSM-IV, p. 332)
A. A distinct period of abnormally and persistently elevated, expansive, or irritable
mood, lasting at least 1 week (or any duration if hospitalization is necessary).
B. During the period of mood disturbance, three (or more) of the following symptoms
have persisted (four if the mood is only irritable) and have been present to a significant
degree:
inflated self-esteem or grandiosity
decreased need for sleep (e.g., feels rested after only 3 hours of sleep)
more talkative than usual or pressure to keep talking
flight of ideas or subjective experience that thoughts are racing
distractibility (i.e., attention too easily drawn to unimportant or irrelevant
external stimuli)
increase in goal-directed activity (either socially, at work or school, or sexually)
or psychomotor agitation
excessive involvement in pleasurable activities that have a high potential for
painful consequences (e.g., engaging in unrestrained buying sprees, sexual indiscretions,
or foolish business investments)
C. The symptoms do not meet criteria for a Mixed Episode.
D. The mood disturbance is sufficiently severe to cause marked impairment in
occupational functioning or in usual social activities or relationships with others, or to
necessitate hospitalization to prevent harm to self or others, or there are psychotic
features.
E. The symptoms are not due to the direct physiological effects of a substance (e.g.,
a drug of abuse, a medication, or other treatments) or a general medical condition (e.g.,
hyperthyroidism).
Note: Manic-like episodes that are clearly caused by somatic antidepressant treatment
(e.g., medication, electroconvulsive therapy, light therapy) should not count toward a
diagnosis of Bipolar I Disorder.
Criteria for Mixed Episode (DSM-IV, p. 335)
A. The criteria are met both for a Manic Episode and for a Major Depressive Episode
(except for duration) nearly every day during at least a 1-week period.
B. The mood disturbance is sufficiently severe to cause marked impairment in
occupational functioning or in usual social activities or relationships with others, or to
necessitate hospitalization to prevent harm to self or others, or there are psychotic
features.
C. The symptoms are not due to the direct physiological effects of a substance (e.g.,
a drug of abuse, a medication, or other treatment) or a general medical condition (e.g.,
hyperthyroidism).
Criteria for Hypomanic Episode (DSM-IV, p. 338)
A. A distinct period of persistently elevated, expansive, or irritable mood, lasting
throughout at least 4 days, that is clearly different from the usual nondepressed mood.
B. During the period of mood disturbance, three (or more) of the following symptoms
have persisted (four if the mood is only irritable) and have been present to a significant
degree:
inflated self-esteem or grandiosity
decreased need for sleep (e.g., feels rested after only 3 hours of sleep)
more talkative than usual or pressure to keep talking
flight of ideas or subjective experience that thoughts are racing
distractibility (i.e., attention too easily drawn to unimportant or irrelevant
external stimuli)
increase in goal-directed activity (either socially, at work or school, or sexually)
or psychomotor agitation
excessive involvement in pleasurable activities that have a high potential for
painful consequences (e.g., engaging in unrestrained buying sprees, sexual indiscretions,
or foolish business investments)
C. The episode is associated with an unequivocal change in functioning that is
uncharacteristic of the person when not symptomatic.
D. The disturbance in mood and the change in functioning are observable by others.
E. The episode is not severe enough to cause marked impairment in social or
occupational functioning, or to necessitate hospitalization, and there are no psychotic
features.
F. The symptoms are not due to the direct physiological effects of a substance (e.g.,
a drug of abuse, a medication, or other treatment) or a general medical condition (e.g.,
hyperthyroidism).
Note: Hypomanic-like episodes that are clearly caused by somatic
antidepressant treatment (e.g., medication, electroconvulsive therapy, light therapy)
should not count toward a diagnosis of Bipolar II Disorder.