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Prevalence of nicotine dependence in monozygotic twins
| Co-Twin Smoking History | Respondent % Nicotine Dependent Among Smokers |
|---|---|
| Never Smoked | 16.67% |
| Smoked 1-2 Times | 4.84% |
| Smoked 3-20 Times | 4.17% |
| Smoked 21-99 Times | 6.52% |
| Smoked 100 Times or More, HSI=0 | 1.63% |
| Smoked 100 Times or More, HSI=1 | 2.47% |
| Smoked 100 Times or More, HSI=2 | 4.79% |
| Smoked 100 Times or More, HSI=3 | 5.06% |
| Smoked 100 Times or More, HSI=4 | 50.78% |
| Smoked 100 Times or More, HSI=5 | 68.42% |
| Smoked 100 Times or More, HSI=6 | 72.73% |
