Diagnostic criteria for Schizophrenia
: Two (or more) of the following, each present for a significant portion of time during a 1-month period (or
less if successfully treated):
(3) disorganized speech (e.g., frequent
(4) grossly disorganized or
Only one Criterion A symptom is required if delusions are bizarre or hallucinations consist of a voice keeping up a running
commentary on the person's behavior or thoughts, or two or more voices conversing with each other.
B. Social/occupational dysfunction: For a significant portion of the time since the onset of the disturbance, one or more major areas
of functioning such as work, interpersonal relations, or self-care are markedly below the level achieved prior to the onset (or when
the onset is in childhood or adolescence, failure to achieve expected level of interpersonal, academic, or occupational
C. Duration: Continuous signs of the disturbance persist for at least 6 months. This 6-month period must include at least 1 month of
(or less if successfully treated) that meet Criterion A (i.e., active-phase symptoms) and may include periods of
or residual symptoms. During these prodromal or residual periods, the signs of the disturbance may be manifested by only negative
symptoms or two or more symptoms listed in Criterion A present in an attenuated form (e.g., odd beliefs, unusual perceptual
exclusion: Schizoaffective Disorder and Mood Disorder With Psychotic Features have been
ruled out because either (1) no
Episodes have occurred concurrently with the active-phase
symptoms; or (2) if mood episodes have occurred during active-phase symptoms, their total duration has been brief relative to the
duration of the active and residual periods.
E. Substance/general medical condition exclusion: The disturbance is not due to the direct physiological effects of a
a drug of abuse, a medication) or a general medical condition.
F. Relationship to a
Pervasive Developmental Disorder
: If there is a history of
or another Pervasive Developmental
Disorder, the additional diagnosis of Schizophrenia is made only if prominent delusions or hallucinations are also present for at least
a month (or less if successfully treated).
Classification of longitudinal course (can be applied only after at least 1 year has elapsed since the initial onset of active-phase