Table 2.
Associations from multivariable models between participant characteristics and a pattern of consistent never smoking among all participants or quitting among ever smokers
| Characteristic | Consistent Never Smoking (N=3304) | Quitting Among Ever Smokers (N=862) | |||
|---|---|---|---|---|---|
| RR (95% CI)1 | P | RR (95% CI)1 | P | ||
| Age at diagnosis | 0–9 years | 1.00 (reference) | 1.00 (reference) | ||
| 10–20 years | 0.94 (0.89–0.99) | 0.02 | 0.93 (0.83–1.03) | 0.17 | |
| Age at last questionnaire | <30 years | 1.00 (reference) | 1.00 (reference) | ||
| 30–39 years | 0.92 (0.75–1.13) | 1.09 (0.65–1.85) | |||
| ≥40 years | 0.86 (0.70–1.06) | 0.03 | 1.09 (0.64–1.86) | 0.94 | |
| Sex | Male | 1.00 (reference) | 1.00 (reference) | ||
| Female | 1.01 (0.96–1.05) | 0.79 | 0.95 (0.88–1.03) | 0.23 | |
| Race/Ethnicity | White, not Hispanic | 1.00 (reference) | 1.00 (reference) | ||
| Others | 1.05 (0.98–1.12) | 0.15 | 1.00 (0.87–1.15) | 0.97 | |
| Household income | <$20,000 | 1.00 (reference) | 1.00 (reference) | ||
| $20,000$59,999 | 1.12 (1.04–1.20) | 1.02 (0.91–1.15) | |||
| $60,000+ | 1.16 (1.08–1.25) | 0.0004 | 1.17 (1.04–1.32) | 0.002 | |
| Education | ≤ High school | 1.00 (reference) | 1.00 (reference) | ||
| > High school | 1.32 (1.22–1.43) | <0.0001 | 1.23 (1.10–1.38) | 0.0002 | |
| Cranial radiation therapy | No | 1.00 (reference) | 1.00 (reference) | ||
| Yes | 1.08 (1.03–1.14) | 0.002 | 0.86 (0.76–0.97) | 0.01 | |
| Chest radiation | No | 1.00 (reference) | 1.00 (reference) | ||
| Yes | 1.02 (0.97–1.08) | 0.46 | 1.07 (0.98–1.17) | 0.11 | |
| Pulmonary-toxic chemotherapy | No | 1.00 (reference) | 1.00 (reference) | ||
| Yes | 1.02 (0.97–1.08) | 0.40 | 0.98 (0.90–1.07) | 0.67 | |
| Cardio-toxic chemotherapy | No | 1.00 (reference) | 1.00 (reference) | ||
| Yes | 1.03 (0.98–1.09) | 0.28 | 1.05 (0.96–1.15) | 0.32 | |
| Number of severe/disabling chronic conditions2 | 0 | 1.00 (reference) | 1.00 (reference) | ||
| 1 | 1.00 (0.94–1.05) | 1.01 (0.92–1.10) | |||
| 2+ | 1.04 (0.96–1.13) | 0.61 | 1.06 (0.92–1.21) | 0.75 | |
| Development of new severe/disabling conditions | No Change | 1.00 (reference) | 1.00 (reference) | ||
| Increased | 0.99 (0.93–1.05) | 0.67 | 0.95 (0.86–1.05) | 0.35 | |
| Psychological distress | No | 1.00 (reference) | 1.00 (reference) | ||
| Yes | 0.86 (0.80–0.92) | <0.0001 | 0.80 (0.72–0.90) | <0.0001 | |
| Heavy drinking | No | 1.00 (reference) | 1.00 (reference) | ||
| Yes | 0.64 (0.58–0.71) | <0.0001 | 0.93 (0.85–1.02) | 0.13 | |
1
Multivariable models included all variables listed in the table
2
Conditions reported at the time of the first smoking status report