Table 1.

Symptom nodes and labels

Node	Label	Items	Measure (item number)
Sad	Sad	Feeling sad	IDS-SR (5)
Self	Self-view	(Negative) View of myselfa	IDS-SR (16)
Sui	Suicidal ideation	Thoughts of death or suicideb	IDS-SR (18)
Int	Interest	(Lack of) General interest	IDS-SR (19)
EyCon	Difficulty making eye contact	I have difficulty making eye contact with others	SIAS (2)
DifCo	Difficulty mixing with co-workers	I find it difficult to mix comfortably with the people I work with	SIAS (4)
SocT	Social tension	I tense up if I meet an acquaintance in the street; I feel tense if I am alone with just one other person	SIAS (6 + 8)
Talk	Difficulty talking with others	I have difficulty talking with other people	SIAS (10)
Dis	Difficulty disagreeing	I find it difficult to disagree with another's point of view	SIAS (13)
AnxT	Anxious tension	Anxious mood: worries, anticipation of the worst, fearful anticipation, irritability; Tension: feelings of tension, fatigability, startle response, moved to tears easily, trembling, feelings of restlessness, inability to relax	HRSA (1 + 2)
Fear	Fears	Fears: of dark, of strangers, of being left alone, of animals, of traffic, of crowds	HRSA (3)
PerAn	Perceptual anomalies	To what extent can you perceive things that others cannot perceive?	Dimensions (10)
Perplx	Perplexity, lack of natural self-evidence	Do you feel that the natural self-evidence of the world around you has been lost? Do you have the profound experience that you have to think about the most obvious things, such as about everyday actions or objects?	Dimensions (11 + 12)
AbSal	Aberrant salience	Has your perception changed, making everything more meaningful?	Dimensions (13)
Threat	Feeling threatened or paranoid	Do you feel that others want to harm you?	Dimensions (14)

In the ‘Measure (item number)’ column, the questionnaire and the item number that each node represents is noted. Variables are coded so that a higher score on an item implies greater severity. IDS-SR, Inventory of Depressive Symptomatology Self-Report; SIAS, Social Interaction Anxiety Scale; HRSA, Hamilton Rating Scale for Anxiety; Dimensions, Psychiatric Dimensions Questionnaire.

^a.View of myself is measured negatively, with higher scores depicting a more negative self-view based on self-blaming and criticism, and ruminating on personal shortcomings and defects.

^b.Suicidal ideation is a broad concept measured as suicidal thoughts and intent. It ranges from mild infrequency of thoughts of death and suicide to more severe suicidal intent. Frequent thoughts of suicide and death are combined with making plans or attempting suicide.