. Author manuscript; available in PMC: 2014 Sep 1.

Published in final edited form as: Bipolar Disord. 2013 Jun 25;15(6):680–693. doi: 10.1111/bdi.12096

Table 1.

Sample Characteristics

	Healthy Subjects (n=56)	Patients with Schizophrenia (N=35)	Bipolar I Disorder (N=20)
Sex (M/F)	31/25	23/12	12/8
Age (years)	31.9 (9.4)	30.6 (10.9)	30.7 (6.2)
Handedness (R/L) ^a	49/7	28/6	15/5
Parental Social Class ^a,^b	2.5 (1.0)	3.0 (0.95)	2.7 (1.1)
Age at Onset (years)	--	21.2 (5.0)	21.9 (6.7)

Notes. Data are presented as mean ± SD in parentheses, unless otherwise indicated.

There were missing data for the following variables: handedness (1 patient with schizophrenia) and parental social class (2 healthy volunteers and 1 patient with schizophrenia).

Parental social class was coded from 1 (highest) to 5 (lowest) using the Hollingshead Redlich Scale (1958).