Table 1.

Characteristics for n = 92 healthy adult subjects

Age, mean (SD) years; range	30.5 (9.2); 18–54
Gender, n (%) Female / n (%) Male	47 (51.1) / 45 (48.9)
Education level, n (%)
High school graduate	3 (3.3)
Technical school	2 (2.2)
Partial college	21 (22.8)
College graduate	47 (51.1)
Graduate school / Professional degree	19 (20.7)
Total family annual income (adult subject) (%)
Less than $25 000	31 (33.7)
$25 000–49 999	21 (22.8)
$50 000–74 999	15 (16.3)
$75 000–99 999	12 (13.0)
More than $100 000	13 (14.1)
Body mass index, mean (SD); range	26.1 (5.0); 19.0–43.3
Normal weight; n (%)	47 (51.1)
Overweight; n (%)	27 (29.3)
Obese; n (%)	18 (19.6)
Cigarette smoker n (%)	4 (4.3)