Factors associated with regular smoking among school adolescents in 26 Brazilian state capitals and the Federal District in each of the contexts analysed (school, home and family rapport), before and after adjustment for the variables included in the same context and age
| Crude OR (95% CI) | Adj. OR* (95% CI) | |
| School context | ||
| Administrative domain | ||
| Public | 1.00 | 1.00 |
| Private | 0.80 (0.67 to 0.95) | 1.22 (1.01 to 1.46) |
| Perception of access to cigarette purchase inside the school | ||
| No | 1.00 | 1.00 |
| Yes | 2.29 (2.00 to 2.63) | 1.79 (1.53 to 2.08) |
| Not aware | 0.50 (0.44 to 0.58) | 0.51 (0.44 to 0.58) |
| Skipped classes without parental permission in the past 30 days | ||
| Never | 1.00 | 1.00 |
| 1 or 2 days | 3.00 (2.54 to 3.54) | 2.49 (2.09 to 2.97) |
| 3 or more days | 7.02 (6.00 to 8.21) | 5.05 (4.31 to 5.92) |
| Household context | ||
| Family composition | ||
| Lives with father and mother | 1.00 | 1.00 |
| Lives with mother | 1.71 (1.48 to 1.98) | 1.51 (1.30 to 1.75) |
| Lives with father | 1.99 (1.53 to 2.58) | 1.72 (1.31 to 2.26) |
| Doesn't live with father or mother | 2.09 (1.71 to 2.55) | 1.65 (1.33 to 2.05) |
| Parents or responsible adults smoke | ||
| None of them smoke | 1.00 | 1.00 |
| One of them smokes | 2.54 (2.09 to 3.10) | 1.38 (1.08 to 1.77) |
| Both smoke | 1.96 (1.68 to 2.30) | 1.17 (0.95 to 1.45) |
| Other people smoked at home in the past 7 days | ||
| None | 1.00 | 1.00 |
| 1–2 days | 1.75 (1.39 to 2.18) | 1.49 (1.14 to 1.94) |
| 3–6 days | 2.14 (1.73 to 2.66) | 1.80 (1.39 to 2.33) |
| Every day | 2.54 (2.17 to 2.98) | 2.04 (1.64 to 2.53) |
| Family rapport | ||
| Meals with mother or responsible adult | ||
| Every day | 1.00 | 1.00 |
| At least on 1 day | 1.20 (1.04 to 1.38) | 1.12 (0.97 to 1.30) |
| Rarely | 1.48 (1.22 to 1.80) | 1.20 (1.00 to 1.45) |
| Never | 2.24 (1.89 to 2.65) | 1.56 (1.30 to 1.88) |
| Parents knew what child was doing in the past 30 days | ||
| Always/most of the time | 1.00 | 1.00 |
| Sometimes/rarely/never | 2.21 (1.93 to 2.52) | 1.68 (1.45 to 1.96) |
| Perception of the parents' reaction if they smoked cigarettes | ||
| Would care a lot | 1.00 | 1.00 |
| Would care little | 6.33 (5.11 to 7.86) | 4.97 (3.99 to 6.19) |
| Would not care | 7.64 (5.64 to 10.36) | 5.25 (3.78 to 7.32) |
| Don't know | 1.94 (1.56 to 2.40) | 1.45 (1.17 to 1.82) |
Source: National Adolescent School-based Health Survey (PeNSE, 2009).
↵* OR adjusted by variables included in the same block plus age.