Table 1.

Groups of prodromal symptoms in psychosis

Symptom group	Individual symptoms† included in each group
Psychological symptom
Mood-related symptom	Depression, anhedonia, guilt, mood swings, suicidal/self-harm ideation or behaviour
‘Neurotic’ symptom	Neuroses, anxiety, irritability and anger, restlessness, worrying thoughts
Behavioural change	Deterioration, social withdrawal, impulsivity, reduced self-esteem, aggressive and disruptive behaviour, odd behaviour
Change in volition	Apathy (loss of drive), tiredness/fatigue (loss of energy), boredom (loss of interest)
Perceptual problem	Hallucinations, delusions, illusions
Cognitive change	Disturbance of attention, concentration/preoccupation difficulties, cognitive/memory impairment, thought disorder/blocking
Substance misuse	Opioids, alcohol, cannabis, hypnotic, cocaine, amphetamine, glue, tobacco, hallucinogen, ecstasy, antidepressant, solvent, other/multiple stimulant, general (codes without specific substance)
Physical symptom	Speech abnormality, sleep disturbance, loss of weight, poor appetite, dryness of the mouth, dysphagia, hyperventilation, muscle tension, epigastric discomfort, palpitations, shortness of breath, excessive wind, decreased libido, menstrual problem (in females), failure of erection (in males)

^†Total number of individual symptoms studied, n = 55