Table 3.

Psychotic symptom assessments of the sample

	Cannabis-user group (n=18)	Non-user group (n=20)	Significance
First interview SAPS score
Hallucinations¹	13.72±8	12.10±8.77	p=0.557 t=-0.593
Delusions¹	21.50±8.12	20.30±5.53	p=0.595 t=-0.537
Bizarre Behavior¹	5.50±3.22	5.45±2.70	p=0.959 t=-0.052
Positive Formal Thought Disorder¹	14.28±7.56	13.40±9.00	p=0.748 t=-0.323
Total¹	54.44±19.15	51.10±21.1	p=0.610 t=-0.509
First interview SANS score
Flattened Mood²	4.00 (11.50)	13.00 (18.75)	p=0.032 u=108.00
Alogia²	0.00 (5.00)	5.00 (12.25)	p=0.030 u=108.00
Loss of Energy and Will²	6.00 (4.00)	13.50 (8.75)	p=0.002 u=74.50
Social Isolation and Anhedonia²	7.50 (9.50)	20.00 (10.00)	p=0.001 u=59.50
Attention¹	9.28±4.11	9.00±3.17	p=0.816 t=-0.234
Total¹	31.94±13.16	58.35±23.78	p=0.001 t=4.167
Second interview SAPS score
Hallucinations²	0.00 (8.00)	0.00 (5.00)	p=0.866 u=175.00
Delusions²	4.00 (7.00)	5.00 (10.00)	p=0.550 u=160.00
Bizarre Behaviour²	0.00 (1.00)	0.00 (2.00)	p=0.329 u=157.50
Positive Formal Thought Disorder²	5.00 (7.00)	0.00 (4.00)	p=0.034 u=110.50
Total²	10.50 (14.50)	6.00 (19.00)	p=0.418 u=152.50
Second interview SANS score
Flattened Mood²	5.00 (11.25)	6.00 (8.25)	p=0.62 t=0.499
Alogia²	0.00 (3.25)	2.00 (4.00)	p=0.176 u=136.00
Loss of Energy and Will¹	4.94±3.31	7.45±4.71	p=0.069 t=1.874
Social Isolation and Anhedonia¹	7.67±5.12	13.71±6.61	p=0.004 t=3.117
Attention²	1.50 (3.50)	3.00 (2.75)	p=0.095 u=126.00
Total¹	22.06±12.60	35.05±19.65	p=0.022 t=2.395

¹Independent groups t test; p values, mean values and standard deviations are given.

²Mann-Whitney U test; p values, median values and interquartile ranges are given.

SAPS: Scale for the Assessment of Positive Symptoms; SANS: Scale for the Assessment of Negative Symptoms.