Table 1. Study samples’ demographics data.

Cases and controls were matched and not statistically different with the exception of smoking condition and body mass index.

	Entire sample (N = 32)	Controls (N = 16)	Schizophrenia cases (non- smoking; N = 6)	Schizophrenia cases (all; N = 16)
Age	34.5 ± 7.8	34.3 ± 10.1	35.9 ± 3.4	34.7 ± 4.8
Male gender	18/32 (56.3%)	9/16 (56.3%)	3/6 (50%)	9/16 (56.3%)
White race	12/20 (37.5%)	5/16 (31.3%)	4/6 (66.6%)	7/16 (43.8%)
Mother’s education	13.6 ± 2.9	14.1 ± 3.0	14 ± 3.4	13.1 ± 2.97
Cigarette smoker	10/32 (31.3%)	0/16 (0%)	0/0 (0%)	10/16 (62.5%)
Body Mass Index	30.1 ± 7.0	25.5 ± 4.5	33.4 ± 7.5	34.7 ± 6.0