ORs and 95% CIs for smoking transitions*
| Initiation | Experimentation | Escalation | Quitting | |||||
|---|---|---|---|---|---|---|---|---|
| N (person-years) | 20 042 | 6362 | 2122 | 2122 | ||||
| N (persons) | 5122 | 2882 | 1529 | 1529 | ||||
| N (events) | 2882 | 1529 | 558 | 655 | ||||
| OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | |
| Female (ref: male) | 0.94 | 0.79 to 1.10 | 1.44 | 1.27 to 1.64 | 0.84 | 0.65 to 1.09 | 1.07 | 0.84 to 1.36 |
| Age† | 1.34 | 1.21 to 1.48 | ||||||
| Age at prior transition‡ | 1.08 | 1.02 to 1.15 | 1.29 | 1.15 to 1.45 | 0.85 | 0.77 to 0.94 | ||
| Years since prior transition§ | 1.34 | 1.25 to 1.44 | 1.35 | 1.09 to 1.66 | 0.57 | 0.44 to 0.73 | ||
| Wales (ref: England) | 0.95 | 0.85 to 1.07 | 0.80 | 0.67 to 0.97 | 0.89 | 0.62 to 1.28 | 0.96 | 0.69 to 1.35 |
| Scotland (ref: England) | 1.00 | 0.89 to 1.13 | 0.82 | 0.69 to 0.97 | 0.86 | 0.59 to 1.24 | 1.32 | 0.95 to 1.82 |
| Northern Ireland (ref: England) | 0.80 | 0.66 to 0.96 | 0.82 | 0.61 to 1.10 | 0.89 | 0.50 to 1.59 | 1.20 | 0.72 to 2.01 |
| Period¶ | 0.66 | 0.56 to 0.78 | 0.78 | 0.72 to 0.85 | 1.08 | 0.90 to 1.28 | 1.09 | 0.92 to 1.29 |
| Period×period | 0.81 | 0.74 to 0.88 | 0.92 | 0.85 to 0.99 | 0.81 | 0.70 to 0.93 | 0.88 | 0.77 to 1.01 |
| Other parental qualifications (ref: degree or higher) | 1.76 | 1.38 to 2.25 | 1.03 | 0.84 to 1.25 | 1.63 | 1.10 to 2.41 | 1.37 | 0.95 to 1.99 |
| No parental qualifications (ref: degree or higher) | 3.82 | 2.84 to 5.14 | 1.23 | 0.96 to 1.58 | 2.19 | 1.32 to 3.63 | 1.29 | 0.82 to 2.03 |
| Age×female | 1.14 | 1.06 to 1.22 | ||||||
| Age×period | 1.04 | 1.00 to 1.08 | ||||||
| Age×period×period | 1.05 | 1.01 to 1.08 | ||||||
| Female×period | 1.01 | 0.92 to 1.11 | ||||||
| Female×period×period | 0.91 | 0.84 to 0.99 | ||||||
| Other parental qualifications×age | 0.92 | 0.83 to 1.02 | ||||||
| No parenal qualifications×age | 0.77 | 0.68 to 0.87 | ||||||
| Other parental qualifications×period | 1.04 | 0.90 to 1.19 | ||||||
| No parental qualifications×period | 1.24 | 1.03 to 1.49 | ||||||
| Years since prior transition×period | 0.74 | 0.59 to 0.93 | 0.94 | 0.72 to 1.23 | ||||
*Data presented are average values across 20 imputed data sets.
†ORs associated with a 1-year increase in age from the reference value of 11 years.
‡ORs associated with a 1-year increase in age at prior transition from the reference value of 11 years.
§ORs associated with a 1-year increase in years since prior transition from the reference value of 0 years.
¶ORs associated with a 5-year increase from the reference value of 2001.