Table 1.
Participant Demographic and Baseline Characteristics
| OROS-MPH (N=127) | Placebo (N=128) | |
|---|---|---|
| Age (Years) | 38.1 (10.4) | 37.5 (9.6) |
| Sex (% Male) | 60.6 | 52.3 |
| Race/Ethnicity (%) | ||
| African-American | 4.8 | 7.0 |
| Caucasian | 86.4 | 78.9 |
| Asian | 1.6 | 1.6 |
| Native American/Alaskan | 0.8 | 0 |
| Other | 3.2 | 4.7 |
| Mixed race | 3.2 | 7.8 |
| Hispanic | 7.9 | 6.3 |
| Marital Status (%) | ||
| Married | 40.5 | 27.8 |
| Separated/Divorced/Widowed | 17.4 | 25.4 |
| Never Married | 42.1 | 46.8 |
| Education (Years) | 14.4 (2.4) | 14.5 (2.4) |
| Employed Full/Part time (%) | 94.4 | 89.7 |
| Lifetime Psychiatric Comorbidity (%) | ||
| Major depression | 32.3 | 35.9 |
| Bipolar disorder | 0.0 | 0.0 |
| Anxiety disorder | 34.6 | 32.8 |
| Substance use disorder | 63.0 | 58.6 |
| DSM-IV ADHD Rating Scale Total Score | 36.0 (7.1) | 36.7 (7.5) |
| Adult ADHD subtype (%) | ||
| Inattentive | 25.2 | 23.4 |
| Hyperactive-Impulsive | 2.4 | 0.8 |
| Combined | 72.4 | 75.8 |
| Smoking history | ||
| Fagerström score | 5.6 (2.1) | 5.4 (2.3) |
| No. of Smoking years | 19.9 (10.0) | 19.5 (9.3) |
| No. of cigarettes/day | 19.8 (8.1) | 19.8 (7.5) |
| No. of past quit attempts | 7.5 (10.3) | 6.4 (9.8) |
Note. Where not specifically indicated, numbers represent means (standard deviations).