Table 1. Demographics characteristics.

Demographics
	Patients	Controls	F	p level
N	17	25
Age in Years (M, SD)	34,3±11	33,4±10	0,082	0,77
Education in Years (M, SD)	14,3±4	14,8±3	0,019	0,89
ICV in mm3 (M, SD)	1532415,6±67771,8	1514682±58693,9	0,82	0,37
Nicotine Cigarettes/day (M, SD)	5,7±7,5	4,6±5,6	0,304	0,58

M=mean; SD=standard deviation; ICV=Intra Cranial Volume.