Table 1.
Demographic and Smoking Variables
| Contingent |
Noncontingent |
||
| n = 10 | n = 10 | p valuea | |
| Demographics | |||
| Age (years) | 28.1 ± 6.2 | 31.4 ± 10.0 | .39 |
| Male (%) | 40 | 40 | .99b |
| Education (years) | 11.9 ± 1.7 | 12.8 ± 1.4 | .21 |
| Methadone characteristics | |||
| Methadone dose (mg) | 117.0 ± 43.2 | 95.9 ± 44.1 | .31 |
| Length of time at dose (days) | 128 (38, 234) | 47 (38, 90) | .29c |
| Smoking characteristics | |||
| Baseline CO level (ppm) | 11.8 ± 6.6 | 14.6 ± 4.0 | .26 |
| Baseline urine cotinine level (ng/ml) | 1,350.7 ± 693.1 | 1,369.9 ± 546.7 | .95 |
| Fagerstrom Test for Nicotine Dependence score | 5.8 ± 1.9 | 6.3 ± 1.2 | .49 |
| Mean age started smoking regularly (years) | 14.1 ± 2.9 | 13.7 ± 2.1 | .36 |
| Mean number of years smoking regularly | 12.2 ± 6.5 | 14.5 ± 9.5 | .54 |
| Mean number of cigarettes per day (past 7 days) | 18.0 ± 2.9 | 19.5 ± 9.6 | .64 |
| Mean nicotine yield per cigarette (mg) | 1.0 ± 0.3 | 1.0 ± 0.1 | .49 |
| Living with a smoker (%) | 40 | 80 | .07b |
| Quitting characteristics | |||
| Mean number of previous quit attempts | 4.1 ± 3.8 | 4.1 ± 3.8 | .99 |
| Longest successful quit duration (days) | 10 (0.5, 60) | 53 (7, 240) | .54c |
| Self-reported motivation to quit (5 = high, 1 = low) | 4.6 ± 0.7 | 4.4 ± 0.8 | .57 |
| Self-reported ability to quit (5 = low, 1 = high) | 3.8 ± 1.3 | 4.0 ± 1.2 | .72 |
Note. Values represent M ± SD unless otherwise noted.
a
p values based on two-sample t tests unless otherwise noted.
b
p values based on chi-square test.
c
Values repesent median (interquartile range). p value based on Wilcoxon rank sum test.