Table 4.
Bivariate Polytomous Logistic Regression Models Predicting No. of Quit Attempts in Past 12 Months for Those Who Reported Smoking at Long-Term Follow-Up (N = 392)
| Independent Variable | No. of Attempts
|
Overall P for Significance | |||||
|---|---|---|---|---|---|---|---|
| None v 6 or More
|
1 or 2 v 6 or More
|
3, 4, or 5 v 6 or More
|
|||||
| OR | 95% CI | OR | 95% CI | OR | 95% CI | ||
| Intervention condition | |||||||
| Self-help | 0.59 | 0.30 to 1.16 | 0.70 | 0.34 to 1.44 | 0.63 | 0.29 to 1.36 | .4688 |
| Peer counseling | 1.0 | ||||||
| Sex | |||||||
| Female | 1.71 | 0.86 to 3.39 | 1.88 | 0.91 to 3.88 | 1.75 | 0.80 to 3.81 | .3715 |
| Male | 1.0 | ||||||
| Age, 1-year increment from mean of 30.5 years* | 1.03 | 0.98 to 1.08 | 1.00 | 0.95 to 1.05 | 1.02 | 0.96 to 1.08 | .4849 |
| Nicotine dependence | |||||||
| Yes | 2.16 | 1.10 to 4.24 | 1.95 | 0.95 to 3.97 | 1.53 | 0.71 to 3.30 | .1315 |
| No | 1.0 | ||||||
| Race/ethnicity | |||||||
| Nonwhite | 0.93 | 0.35 to 2.46 | 0.31 | 0.09 to 1.07 | 0.84 | 0.27 to 2.63 | .1669 |
| White | 1.0 | ||||||
| Education at follow-up | |||||||
| ≤ HS | 1.54 | 0.56 to 4.25 | 1.36 | 0.46 to 4.01 | 1.53 | 0.49 to 4.76 | .6334 |
| Post HS | 0.72 | 0.31 to 1.70 | 0.85 | 0.34 to 2.11 | 0.67 | 0.25 to 1.79 | |
| College | 1.0 | ||||||
| Marital status at follow-up | |||||||
| Single | 0.85 | 0.41 to 1.75 | 1.26 | 0.59 to 2.71 | 1.02 | 0.44 to 2.37 | .2727 |
| Widow/divorce | 4.02 | 1.14 to 14.14 | 3.72 | 1.01 to 13.77 | 3.65 | 0.94 to 14.16 | |
| Married | 1.0 | ||||||
| Cancer type | |||||||
| Bone/STS/Wilms’ | 0.89 | 0.40 to 1.99 | 1.34 | 0.58 to 3.10 | 1.14 | 0.46 to 2.83 | .5618 |
| CNS | 0.54 | 0.22 to 1.28 | 0.66 | 0.26 to 1.67 | 0.85 | 0.32 to 2.28 | |
| Leukemia/lymphoma | 1.0 | ||||||
| Treatment type, radiation | |||||||
| Yes | 1.03 | 0.53 to 2.00 | 1.60 | 0.78 to 3.28 | 0.66 | 0.31 to 1.41 | .0459 |
| No | |||||||
| Use of nicotine replacement therapy | |||||||
| No | 0.70 | 0.22 to 2.21 | 0.54 | 0.16 to 1.77 | 0.39 | 0.12 to 1.34 | .3758 |
| Yes | 1.0 | ||||||
| Cancer at follow-up | |||||||
| Yes | 0.73 | 0.36 to 1.45 | 0.73 | 0.35 to 1.52 | 0.71 | 0.32 to 1.58 | .8109 |
| No | 1.0 | ||||||
| No. of cigarettes/day from mean of 14* | 1.08 | 1.03 to 1.12 | 1.07 | 1.02 to 1.12 | 1.06 | 1.01 to 1.11 | .0153 |
| Confident can quit smoking in 1 month | |||||||
| Not at all/a little | 3.85 | 1.52 to 9.75 | 2.44 | 0.93 to 6.40 | 5.26 | 1.46 to 19.04 | .0261 |
| Somewhat | 1.62 | 0.60 to 4.38 | 1.38 | 0.50 to 3.85 | 4.00 | 1.06 to 15.14 | |
| Very/extremely | 1.0 | ||||||
| Confident can quit smoking in 6 months | |||||||
| Not at all/a little | 3.97 | 1.65 to 9.52 | 1.90 | 0.75 to 4.82 | 1.22 | 0.45 to 3.27 | .0022 |
| Somewhat | 1.71 | 0.78 to 3.76 | 1.64 | 0.73 to 3.67 | 0.86 | 0.36 to 2.07 | |
| Very/extremely | 1.0 | ||||||
| Short-term self-efficacy | |||||||
| Low | 3.85 | 1.52 to 9.75 | 2.44 | 0.93 to 6.40 | 5.26 | 1.46 to 19.04 | .0261 |
| Medium | 1.62 | 0.60 to 4.38 | 1.38 | 0.50 to 3.86 | 4.00 | 1.06 to 15.14 | |
| High | 1.0 | ||||||
| Stage of change at baseline | |||||||
| Precontemplation | 7.36 | 2.31 to 23.43 | 1.31 | 0.37 to 4.65 | 0.75 | 0.19 to 2.98 | < .0001 |
| Early contemplation | 2.14 | 0.94 to 4.86 | 1.24 | 0.54 to 2.87 | 0.42 | 0.16 to 1.12 | |
| Contemplation | 2.46 | 0.92 to 6.61 | 1.36 | 0.49 to 3.76 | 0.79 | 0.26 to 2.34 | |
| Preparation | 1.0 | ||||||
NOTE. Referent group being 6 or more attempts.
Abbreviations: OR, odds ratio; HS, high school; STS, soft tissue sarcoma.
*
These variables are coded as continuous variables in the model, the referent value is the mean.