Table 1.
Characteristics of methamphetamine-dependent and healthy control subjects
| Subjects | MA group (n = 23) | HC group (n = 18) | ||||||
|---|---|---|---|---|---|---|---|---|
| Mean | n | SD | % | Mean | n | SD | % | |
| Age (years) | 32.2 | 9.7 | 33.3 | 8.4 | ||||
| Tobacco (cigarettes/day) | 10.5 | 6.4 | 16.7 | 7.0 | ||||
| Tobacco (years) | 13.4 | 9.4 | 13.6 | 6.9 | ||||
| Tobacco (Fagerström score) | 3.4 | 1.9 | 4.2 | 1.8 | ||||
| Alcohol (drinks/week) | 1.8 | 1.9 | 2.6 | 2.4 | ||||
| MA abuse (g/week) | 3.8 | 4.0 | – | – | ||||
| MA abuse (years) | 8.0 | 7.0 | – | – | ||||
| Sex (men) | 10 | 43.5 | 11 | 61.1 | ||||
| Handedness (right) | 23 | 100 | 18 | 100 | ||||
| Tobacco users | 23 | 100 | 18 | 100 | ||||
| Alcohol users | 11 | 47.8 | 12 | 66.7 | ||||
| Lifetime cannabis | 9 | 39.1 | 1 | 5.6 | ||||
| Lifetime cocaine | 5 | 21.7 | 0 | 0 | ||||
MA methamphetamine abuser, HC healthy control, SD standard deviation