Table 2.

Demographic data, history of psychosis, and psychosis spectrum personality traits for first-degree relatives

	Healthy Controls		Relatives of Schizophrenia Probands		Relatives of Schizoaffective Probands		Relatives of Bipolar w/ Psychosis Probands		Findings
	n=289		n=315		n=193		n=259
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Age (years)	37.78	(12.67)	43.25	(14.97)	40.45	(16.46)	40.49	(15.94)	F= 6.74§ a
Education (years)	15.1	(2.58)	13.98	(2.41)	13.97	(2.91)	14.61	(2.73)	F= 11.014§ b,c
Wide Range Achievement	103.01	(13.77)	97.38	(15.08)	99.79	(15.61)	103.21	(13.93)	F= 10.61§ c
Test–IV: Reading test (SS)
Sex	n	%	n	%	n	%	n	%
Male	123	42.6%	95	30.2%	59	30.6%	85	32.8%	χ2=12.6* d
Female	166	57.4%	220	69.8%	134	69.4%	174	67.2%
Race
Caucasian	181	62.8%	170	54%	120	62.2%	208	80.3%	χ2=54.3§ e
Afr.-American	79	27.4%	127	40.3%	63	32.6%	43	16.6%
Other	29	9.7%	18	5.7%	10	5.2%	8	3.1%
Positive psychosis history			39	12.4%	27	14.0%	23	8.9%
Relatives with no psychosis history
Elevated Cluster A traits			44	14.0%	31	16.1%	31	12.0%
Elevated Cluster B traits			18	5.7%	11	5.7%	18	6.9%
Not Elevated			214	67.9%	122	63.2%	184	71.0%

^*p < .05

^§p ≤ .001

^aControls < Relatives of Schizophrenia

^bControls > Relatives of Schizophrenia and Schizoaffective

^cControls, Relatives of Schizoaffective>Relatives of Schizophrenia

^dDisproportionate number of males in Schizophrenia and Control groups

^eDisproportionate number of African Americans and Caucasians in Relatives of Schizophrenia and Relatives of Bipolar groups