Table 2.

Demographic data. Differences between the two genotype groups are bolded

Demographic Characteristic	Val/Val	Val/Met & Met/Met	Significance
N	67	32
Age (mean)	24.04 ± 0.53	23.56 ± 0.66	NS
Weight (mean)	152.54 ± 3.20	145.63 ± 3.60	NS
BMI (mean)	22.87 ± 0.29	22.03 ± 0.38	NS
Education (mean yrs)	14.96 ± 0.21	15.06 ± 0.27	NS
Ethnicity
%Hispanic	7	22	p = 0.040
%Caucasian	51	72	p = 0.047
%African-American	28	3	p = 0.003
%Asian	13	9	NS
%American Indian	0	3	NS
Gender
%Male	51	50	NS
Current Drug Use
Alcohol (mean d/wk)	3.72 ± 0.39	4.94 ± 0.58	NS
Cigarettes (mean cigs/wk)	0.69 ± 0.24	1.55 ± 0.57	NS
Caffeine (mean cups/d)	1.22 ± 0.15	1.54 ± 0.26	NS
Marijuana (%yes)	25	22	NS
Lifetime Substance Use (ever used)
Stimulants (% yes)	16	28	NS
Sedatives (% yes)	6	3	NS
Opiates (% yes)	12	16	NS
Hallucinogens (% yes)	31	47	NS
Marijuana (% yes)	75	72	NS
Inhalants (% yes)	13	9	NS