Table 1.

Summary of demographic information

	Affected Individuals (n=219)			Relatives (n=211)
	Number	Missing data	%	Number	Missing data	%
Sex	206	13		198	13
Female	151		73.3	164		82.8
Male	55		26.7	34		17.2
Ethnicity	201	18		193	18
Caucasian	176		87.6	169		87.6
Asian	6		3	6		3.1
African American	4		2	1		0.5
First Nation	4		2	0		0
Othera	11		5.5	17		8.8
Age	204	15		198	13
Under 25	72		35.3	24		12.1
25 – 50	123		60.3	132		66.7
Over 50	9		4.4	42		21.2
Education	204	15		199	12
High school	82		40.2	46		23.1
Other skilled qualification	26		12.7	41		20.6
Undergraduate degree	69		33.8	61		30.7
Postgraduate education	27		13.2	51		25.6
Psychiatric diagnosis (self or relative)	219	0		211	0
Bipolar disorder	108		49.3	49		23.2
Schizophrenia	41		18.7	122		57.8
Schizoaffective disorder	27		12.3	18		8.5
Psychosis	36		16.5	20		9.5
Disorder with psychosisb	7		3.2	2		1.0

Note. Percentages are based on non-missing data.

^aOther ethnicities included Hispanic, Mixed, and “Canadian”.

^bDisorders with psychosis included schizophreniform disorder, reports of hallucinations and delusions without a specific diagnosis, depression with psychosis, or reports of both diagnoses of schizophrenia and bipolar disorder