Table 3. Logistic regression analysis of the determinants of the scores for the University of São Paulo Reasons for Smoking Scale domains.
| USP-RSS domain | OR | 95% CI | p* |
|---|---|---|---|
| Determinant | |||
| Physical dependence | |||
| Smoking history | |||
| < 10 pack-years | − | − | − |
| 11-20 pack-years | 6.2 | (1.6-26.8) | 0.009 |
| 21-30 pack-years | 15.8 | (3.9-63.2) | < 0.001 |
| > 30 pack-years | 15.1 | (4.3-52.7) | < 0.001 |
| Symptoms of depression | 3.7 | (1.7-8.1) | 0.001 |
| Pleasure of smoking | |||
| Smoking history | |||
| < 10 pack-years | − | − | |
| 11-20 pack-years | − | − | |
| 21-30 pack-years | 3.9 | (1.3-12.0) | 0.01 |
| > 30 pack-years | 5.7 | (2.2-52.7) | < 0.001 |
| Female gender | 2.1 | (1.0-4.3) | 0.04 |
| ≤ 4 years of schooling | 2.7 | (1.0-7.0) | 0.04 |
| Tension reduction | |||
| Smoking history | |||
| < 10 pack-years | − | − | |
| 11-20 pack-years | 4.3 | (1.3-14.4) | 0.01 |
| 21-30 pack-years | − | − | |
| > 30 pack-years | 4.6 | (1.7-7.4) | 0.006 |
| Female gender | 3.5 | (1.0-4.3) | < 0.001 |
| Level of education | |||
| ≤ 4 years of schooling | 6.6 | (2.3-18.8) | < 0.001 |
| 5-8 years of schooling | 4.9 | (1.7-14.4) | 0.004 |
| 9-12 years of schooling | 4.3 | (1.5-12.0) | 0.004 |
| ≥ 13 years of schooling | − | − | |
| Stimulus | |||
| ≤ 4 years of schooling | 5.9 | (1.2-29.1) | 0.03 |
| Symptoms of depression | 3.6 | (1.4-8.8) | 0.006 |
| Automatism | − | − | − |
| Handling | − | − | − |
| Social smoking | |||
| Symptoms of depression | 3.2 | (1.3-7.7) | 0.01 |
| Weight control | |||
| Female gender | 3.4 | (1.3-9.1) | 0.01 |
| Close association | |||
| COPD | 3.2 | (1.4-7.8) | 0.007 |
| Symptoms of depression | 2.7 | (1.2-5.5) | 0.009 |
| > 30 pack-year smoking history | 3.5 | (1.1-11.2) | 0.02 |
USP-RSS: University of São Paulo Reasons for Smoking Scale.