. Author manuscript; available in PMC: 2014 Apr 11.

Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2013 Nov 8;165(1):9–18. doi: 10.1002/ajmg.b.32212

TABLE I.

Demographic Characteristics of the Sample

	SCZ (n =70)	BPD (n =129)	Controls (n =74)	Statistic	P-value
Age, years	42.4 (13.9)	41.7 (12.5)	35.78 (14.0)	F_2,269 = 7.0	P =0.001
Female sex, N (%)	21 (30)	65 (50)	42(57)	F_2,269 = 5.9	P =0.003
Education, years	14.15 (2.1)	15.34 (2.3)	15.38 (2.5)	F_2,158 = 4.1	P =0.02
Current smoker^b, N (%)	32 (46)	37 (29)	7 (10)	F_2,264 = 12.4	P <0.001
Nr cigarettes/day, if smoker	19.3 (16.3)	15.3 (9.1)	5.7 (5.7)	F_2,67 = 3.4	P =0.03
Age of illness onset	23.55 (7.8)	21.00 (7.2)	N/A	t =2.12	P =0.16
CPZ^a	632.76 (521.6)	481.17 (489)	N/A	t =1.72	P =0.09

Note: Data are presented as mean (SD) unless otherwise indicated. (SCZ schizophrenia, BPD bipolar disorder).

SCZ n =54, BPD n =94.

SCZ n = 69, BPD n =127, controls n =71.