Table 1.
Baseline Participant Characteristics: Mean ( SD ), Median, or Percentage
| Full sample | CV | NV | |
|---|---|---|---|
| N | 338 | 172 | 166 |
| Male | 68% | 66% | 69% |
| Race | |||
| White/Caucasian | 86% | 85% | 87% |
| Black/African American | 10% | 11% | 9% |
| Asian/Pacific Islander | <1% | 0% | <1% |
| American Indian | 2% | 4% | <1% |
| Multi-racial | 1% | 0% | 2% |
| Married or cohabiting | 11% | 10% | 12% |
| Annual household income | |||
| $0–$9999 | 59% | 61% | 57% |
| $10 000–$29 999 | 26% | 23% | 29% |
| $30 000–$49 999 | 9% | 9% | 9% |
| ≥$50 000 | 6% | 7% | 5% |
| Age | 37.6 (10.0) | 37.9 (10.1) | 37.4 (10.0) |
| Years education | 12.1 (2.2) | 12.2 (2.0) | 12.1 (2.2) |
| Cigarettes/d | 19.5 (7.4) | 20.0 (8.0) | 19.0 (6.7) |
| FTND | 5.9 (1.9) | 5.9 (1.8) | 6.0 (2.0) |
| CPT breakpoint | $5.26 (9.0) | $6.09 (10.0) | $4.40 (7.8) |
| CPT Omax | $16.74 (15.6) | $17.61 (17.1) | $15.83 (14.0) |
| CPT intensity | 30.0 (14.9) | 29.7 (14.9) | 30.3 (15.1) |
| CPT elasticity | 0.02 (0.03) | 0.02 (0.03) | 0.02 (0.03) |
| % Heavy drinking days | 39.0 (38.8) | 40.9 (38.9) | 37.1 (37.6) |
| % Other drug days | 54.2 (39.9) | 55.6 (40.7) | 52.6 (39.0) |
CPT = Cigarette Purchase Task; CV = contingent vouchers group; FTND = Fagerström Test of Nicotine Dependence total score; NV = noncontingent vouchers group.