Diagnostic Criteria for Schizophrenia

Schizophrenia is a fascinating set of phenomena, the study of which has launched a thousand ships including, arguably, my field, family therapy; many of the original family therapists left psychiatry to study schizophrenia (or, as the DSM would have me write it, Schizophrenia–capitalizing words gives them more authority, don’t you think?) as an interactive process. That is, if all behaviors make sense in their context, what context might make schizophrenic behavior necessary?

There was an almost violent backlash against this line of thinking, as it seemed to (and did, in many cases) blame mothers for their schizophrenic children–as in the unfortunate phrase “schizophrenogenic mother.” The conventional wisdom about schizophrenia these days reads like a pharmaceutical company press release, something like, “Schizophrenia is a biological disease of the brain which is at present incurable, but there are drugs which can help manage the symptoms, and if taken regularly can provide a decent quality of life.”

So schizophrenia is assumed to be a biological disease of the brain though it, like every other Mental Disorder, has no laboratory test that can detect its presence. The best we can do is a set of behavioral diagnostic criteria which, frankly, are a bit of a mess. You may notice as you read that different flavors of schizophrenia may have nothing or little in common with each other. Are they really the same “disease”? We don’t know.

We do have good evidence that you can inherit, in some fashion, a tendency for one of these constellations of behaviors. There is good evidence that environmental factors are also important, though they are not a big part of the mainstream discussion. We also have evidence that therapy helps in a lot of cases. There is some (hotly contested, I’m sure) evidence from the World Health Organization that unmedicated schizophrenics can eventually recover while those on medication do not. Here is a trailer for a moving documentary about two recovered women and the public perception of schizophrenia, called Take These Broken WingsAlso, consider checking out the documentary A Brilliant Madness, about John Nash, in which puts the lie to A Brilliant Mind, which showed Nash recovering with the help of psychopharmaceuticals.

The DSM says that schizophrenia may be overdiagnosed (or at least is diagnosed more often) in African- and Asian-American men, that it affects men differently than women (men tend towards the negative symptoms were women tend towards delusions and hallucinations), and that incidence rates are something like .5-1.5% of adults.

Here are a few terms that you’ll need to know to get through the criteria:

affective flattening: does not show emotion. Also, “affect” means “emotion” to scientists and people who like to talk like scientists.

alogia: lack of speech.

avolition: lack of motivation.

prodromal: symptoms coming early on in the course of a disease.

echolalia: repetition of others’ speech sounds.

echopraxia: repetition of others’ movements

And here are the diagnostic criteria, word-for-word, from the DSM-IV-TR, pp. 312-319:

Diagnostic criteria for Schizophrenia

A. Characteristic symptoms: Two (or more) of the following, each present for a significant portion of time during a 1-month period (or less if successfully treated):

(1) delusions

(2) hallucinations

(3) disorganized speech (e.g. frequent derailment or incoherence)

(4) grossly disorganized or catatonic behavior

(5) negative symptoms, i.e., affective flattening, alogia, or avolition

Note: 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 significatn portion of the time since th onset of the distrubance, one or more major areas of functioning such as work, interpersonal relations, or self-care are mardekly below the level achieved prior to the onset (or when the onset is in childhood or adolewscence, faliure to achieve expected level of interpersonal, academic, or occupational achievement).

C. Duration: Continuou signs of the disturbance persist for at least 6 months. This 6-month period must include at least 1 month of symptoms (or less if successfully treated) that meet Criterion A (i.e., active-phase symptoms) and may include periods of prodromal or residual symptoms. Doring these prodromal or residual periods, the signs of the ditrubance may be manifested by only negative symptoms or two or more symptoms listen in Criterion A pressent in an attenuated form (e.g., odd beliefs, unusual perceptual experiences).

D. Schizoaffective and Mood Disorder exclusion: Schizoaffective Disorder and Mood Disorder With Psychotic Features have been ruled out because either (1) no Major Depressive, Manic, or Mixed 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 substance (e.g. a drug of abuse, a medication) or a general medical condition.

F. Relationship to a Pervasive Developmental Disorder: If there is a history of Autistic Disorder 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 symptoms):

Episodic With Interepisode Residual Symptoms (episodes are difined by the reemergence of prominent psychotic symptoms); also specify if: With Prominent Negative Symptoms

Episodic With No Interepisode Residual Symptoms

Continuous (prominent psychotic symptoms are present throughout the period of observation); also specify if: With Prominent Negative Symptoms

Single Episode In Partial Remission; also specify if: With Prominent Negative Symptoms

Single Episode In Full Remission

Other or Unspecified Pattern

Diagnostic criteria for 295.30 Paranoid Type

A type of Schizophrenia in which the following criteria are met:

A. Preoccupation with one or more delusions or frequent auditory hallucinations.

B. None of the following is prominent: disorganized speech, disorganized or catatonic behavior, or flat or inappropriate affect.

Diagnostic criteria for 295.10 Disorganized Type

A type of Schizophrenia in which the following criteria are met:

A. All of the following are prominent:

(1) disorganized speech

(2) disorganized behavior

(3) flat or inappropriate affect

B. The criteria are not met for Catatonic Type.

Diagnostic criteria for 295.20 Catatonic Type

A type of Schizophrenia in which the clinical picture is dominated by at least two of the following:

(1) motoric immobility as evidenced by catalepsy (including waxy flexibility) or stupor

(2) excessive motor activity (that is apparently purposeless and not influenced by external stimuli

(3) extreme negativism (an apparently motiveless resistance to all instructions or maintenance of a rigid posture against attempts to be moved) or mutism

(4) peculiarities of voluntary movement as evidenced by posturing (voluntary assumptions of inappropriate or bizarre postures), stereotyped movements, prominent mannerisms, or prominent grimacing

(5) echolalia or echopraxia

Diagnostic criteria for 295.90 Undifferentiated Type

A type of Schizophrenia in which symptoms that meet Criterion A are present, but the criteria are not met for the Paranoid, Disorganized, or Catatonic Type.

Diagnostic criteria for 295.60 Residual Type

A type of Schizophrenia in which the following criteria are met:

A. Absence of prominent delusions, hallucinations, disorganized speech, and grossly disorganized or catatonic behavior.

B. There is continuing evidence of the disturbance, as indicated by the presence of negative symptoms or two or more symptoms listed in Criterion A for Schizophrenia, present in an attenuated form (e.g., odd beliefs, unusual perceptual experiences).

[First published on Nathen’s Miraculous Escape, May 31, 2010.]


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