Table 1. Mean, s.d. and group differences for demographic data, questionnaire data, and rating scores of the emotion regulation task and descriptives of medication status and psychotic symptoms.

	HC (n=16) Mean±s.d.	UHR (n=15) Mean±s.d.	Test statistic		Confidence interval (95%)
Demographics
Gender (% male)	50%	53%	χ 2(1)=0.02	P=0.88	−0.32	0.38
Age (in years)	22.1±3.6	23.1±4.4	t(29)=−0.70	P=0.49	−4.0	2.0
Educationa	5.4±0.6	5.2±09	t(29)=0.88	P=0.37	−0.31	0.79
Handedness (% right)	75%	80%	χ 2(1)=0.02	P=0.88	−0.26	0.34
PANAS
Positive affect	33.4±5.4	30.0±7.7	t(29)=1.48	P=0.15	−1.33	8.34
Negative affect	12.4±2.0	22.3±6.7	t(16.3)=−5.5	P<0.001b , c	−13.75	−6.16
ERQ
Reappraisal	5.1±1.0	4.2±09	t(29)=2.74	P=0.01b	0.24	1.63
Suppression	4.5±1.7	4.1±1.2	t(29)=0.85	P=0.40	−0.62	1.52
Rating scores
Attend neutral	1.1±02	1.3±04	U=64.0	P=0.03d
Attend negative	2.4±05	2.5±07	U=108.5	P=0.65
Reappraise	1.8±04	2.1±06	U=86.5	P=0.18
Current medication status (n)
Antipsychotics	0	0
Antidepressants (SSRI)	0	4
Methylphenidate	0	2
Other medication	1	1
PANSS
Positive symptoms	NA	13.1±2.7
Negative symptoms	NA	10.5±2.5
General symptoms	NA	28.3±6.1
DSM diagnosis (n)
MDD		3
Depressive disorder nos	NA	1
Adjustment disorder	NA	4
Personality disorder nos	NA	1
OCD	NA	1
Eating disorder nos	NA	1
ADHD	NA	1
PTSD	NA	1
Learning disorder NOS	NA	1
Unspecified mental disorder (non-psychotic)	NA	1

Abbreviations: ADHD, Attention deficit Hyperactivity disorder; ERQ, Emotion regulation questionnaire; HC, healthy control; MDD, Major depressive disorder; NOS, Not otherwise specified; OCD, Obsessive Compulsive Disorder; PANAS, Positive and negative symptom scale; PANSS, Positive and Negative Syndrome Scale; PTSD, post-traumatic stress disorder; SSRI: Selective serotonin reuptake inhibitor; UHR, ultra-high risk.

^aEducation according to Verhage. ⁵⁷

^bSignificant at P<0.05.

^cEqual variances not assumed.

^dNot significant at the corrected P-value of P<0.017.