Table 1.

Sample characteristics (SE).

Characteristic	Schizophrenia			Schizoaffective psychosis			Psychosis FI			Cases			Controls			Total participants
	n	Mean	SE	n	Mean	SE	n	Mean	SE	n	Mean	SE	n	Mean	SE	n	Mean	SE
Age	33	40.7	2.0	30	40.8	1.9	4	37.3	7.4	67	40.5	1.3	67	45.7	1.4	134	43.1	1.0
Age of onset	31	23.9	2.0	27	22.5	1.5	3	32.7	10.1	61	23.7	1.3	0			61	23.7	1.3
Duration of illness (DOI)	31	16.5	1.9	27	18.0	2.3	3	8.0	1.0	61	16.8	1.4	0			61	16.8	1.4
Symptom intensity rating (SIR)	33	113.8	5.7	30	94.4	5.7	4	119.5	14.8	67	105.4	4.0	67	42.8	0.3	134	74.1	3.4
Body mass index (BMI)	23	31.1	2.3	27	29.6	1.4	3	25.8	1.2	53	30.0	1.2	66	26.7	0.6	119	28.2	0.6
Right hand dominance %	32	92.1	3.0	29	94.5	2.4	4	82.5	17.5	65	92.6	2.1	67	93.1	1.7	132	92.8	1.3
Urine creatinine (mmol/L)	33	8.8	0.9	29	9.3	1.2	4	12.3	5.1	66	9.2	0.7	67	9.5	0.7	133	9.3	0.5
5-Hydroxyl indole acetic acid (5-HIAA)	33	4.6	1.4	29	3.3	0.8	4	9.5	4.8	66	4.3	0.8	67	1.6	0.1	133	2.9	0.4
Plasma homocysteine (μmol/L)	33	10.5	0.4	29	9.5	0.5	4	9.3	1.4	66	10.0	0.3	66	9.5	0.3	132	9.7	0.2
Red cell acetylcholine esterase (U/gb Hb)	29	38.3	0.9	29	41.6	1.2	3	37.3	1.9	61	39.8	0.7	67	39.6	0.7	128	39.7	0.5
Hearing threshold (dB)	31	548.4	27.0	23	587.0	67.8	3	500.0	0.0	57	561.4	30.8	60	550.0	19.5	117	555.6	18.0
Visual threshold of near vision	32	6.5	0.6	26	6.0	0.7	3	8.0	3.0	61	6.3	0.5	67	5.2	0.1	128	5.7	0.2
	Schizophrenia			Schizoaffective psychosis			Psychosis FI			Cases			Controls			Total participants
		n	%		n	%		n	%		n	%		n	%		n	%
Sex
Female		12	36.4		16	53.3		2	50.0		30	44.8		34	50.7		64	47.8
Male		21	63.6		14	46.7		2	50.0		37	55.2		33	49.3		70	52.2
Persons		33	100.0		30	100.0		4	100.0		67	100.0		67	100.0		134	100.0