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Table 1 Clinical staging framework for mental health disorders (Hickie et al., [15])

From: Brain connectomes in youth at risk for serious mental illness: an exploratory analysis

Stage

Definition

0

No clinical symptoms

Increased risk of disorder (family history); or developmental disorder

1a

Distress disorder

No attenuated psychotic symptoms

Non-specific symptoms of anxiety or depression

Mild to moderate severity of symptoms

May include subjective/objective evidence of mild cognitive deficits

Evidence of only recent or mild impacts of illness on social, educational, or occupational functioning

May include those with earlier neurodevelopmental or attentional disorders

who now present with anxiety or depressive symptoms

1b

Attenuated syndromes

Distress disorder plus at least one moderate to severe attenuated psychotic symptom (unusual thoughts, suspiciousness, perceptual abnormalities, grandiosity, disorganization)

Specific symptoms of anxiety or depression, brief hypomania, or brief psychotic phenomena

May meet criteria of psychosis-risk syndromes

May present with subthreshold manic symptoms

May include subjective/objective evidence of at least moderate cognitive change

Moderate to severe impact of illness on social, educational, or occupational functioning

2

Discrete disorders

Discrete episodes of psychosis, mania or severe depression

Full threshold disorder with moderate to severe symptoms and persistence over time

Major impact of illness on social, educational, or occupational functioning

Stages not relevant for this project

3a-3c

Incomplete remission to multiple relapses

4

Unremitting course of illness