Table 1.

Demographic and Clinical Characteristics for schizophrenia patients, first-degree family members, and healthy comparison subjects.

	Schizophrenia Probands (n = 64)			Family Members (n = 27)			Healthy Controls (n = 54)
Characteristic	Mean	SD	n	Mean	SD	n	Mean	SD	n
Age (years)	36.97	10.82		36.30	16.33		33.20	10.87
Sex (Males | Females)			36 | 28			9 | 18			30 | 24
Education level* (years)	12.67	2.28		13.44	1.93		14.33	2.14
Mother’s Education (years)	13.02	2.91		12.33	2.73		14.16	2.42
Father’s Education (years)	13.04	3.90		13.14	3.72		13.69	3.06
Packs/day*	0.47	0.65		0.21	0.37		0.15	0.37
Illness Duration (years)	15.51	10.19
Age of Onset (years)	21.47	6.70
SANS† Total	27.70	17.05
SAPS‡ Total	18.25	16.66

^*Significant difference (P < 0.05)

^†SANS = Scale for the Assessment of Negative Symptoms (Andreasen, 1984a)

^‡SAPS = Scale for the Assessment of Positive Symptoms (Andreasen, 1984b)