Table 3.
Multivariate prevalence ratiosa (CI95%) for smoking, drinking alcohol and sexually activityb
| Variable | Categories | PR of smoking | PR of drinking | PR of sexually active |
| Age | 15 – 18 | 1.0 | 1.0 | 1.0 |
| 19 – 21 | 0.931 (0.804 – 1.051) | 1.152 (1.049 – 1.245)*** | 1.298 (1.153 – 1.439)*** | |
| Sex | Women | 1.0 | 1.0 | 1.0 |
| Men | 3.101 (2.489 – 3.621)*** | 1.781 (1.538 – 2.003)*** | 0761 (0.671 – 0.856) | |
| Socioeconomic level | Lowest 20% | 1.0 | 1.0 | 1.0 |
| Second lower 20% | 0.981 (0.903 – 1.040) | 1.006 (0.956 – 1.047) | 1.236 (1.003 – 1.507)** | |
| Remaining 60% | 1.018 (0.985 – 1.040) | 1.034 (1.009 – 1.052)** | 1.541 (1.117 – 2.101)*** | |
| Adolescent attending school | No | 1.0 | 1.0 | 1.0 |
| Yes | 0.759 (0.592 – 0.896)*** | 0.957 (0.836 – 1.058) | 0.447 (0.325 – 0.606)*** | |
| Education level at standard for age | No | 1.0 | 1.0 | 1.0 |
| Yes | 0.932 (0.859 – 0.987)** | 1.002 (0.932 – 1.060) | 0.529 (0.391 – 0.707)*** | |
|
Educational gap of adolescents not attending school and with education level not standard for age |
0 | 1.0 | 1.0 | 1.0 |
| Years of gap | 0.993 (0.981 – 1.005) | 0.997 (0.986 – 1.007) | 1.000 (0.994 – 1.002) | |
| Report labor activities | No | 1.0 | 1.0 | 1.0 |
| Yes | 1.115 (0.901 – 1.347) | 1.314 (1.075 – 1.550)*** | 0.700 (0.619 – 0.785)*** | |
| Attending school and report labor activities | No | 1.0 | 1.0 | 1.0 |
| Yes | 1.028 (0.989 – 1.046) | 0.977 (0.899 – 1.024) | 1.266 (0.782 – 1.999) | |
| Living with a partner | No | 1.0 | 1.0 | 1.0 |
| Yes | 1.006 (0.902 – 1.082) | 0.963 (0.894 – 1.024) | 3.241 (2.854 – 3.616)*** | |
| Count with a close friend | No | 1.0 | 1.0 | 1.0 |
| Yes | 1.016 (0.762 – 1.316) | 0.924 (0.787 – 1.075) | 0.965 (0.806 – 1.145) | |
| Geographical area of residence | Center | 1.0 | 1.0 | 1.0 |
| Golf | 0.922 (0.832 – 0.994)** | 0.933 (0.845 – 1.003)* | 1.264 (1.016 – 1.548)** | |
| North | 1.078 (0.873 – 1.228) | 0.998 (0.893 – 1.080) | 1.131 (0.919 – 1.375) | |
| North Pacific | 0.990 (0.929 – 1.021) | 1.001 (0.981 – 1.015) | 1.389 (1.049 – 1.828)*** | |
| Central Pacific | 1.024 (0.862 – 1.131) | 1.147 (1.049 – 1.220)*** | 1.204 (0.935 – 1.530) | |
| South Pacific | 0.876 (0.723 – 0.969)*** | 0.914 (0.798 – 0.990)** | 1.018 (0.801 – 1.279) | |
| Yucatan peninsula | 0.980 (0.958 – 0.995)*** | 0.998 (0.976 – 1.013) | 0.909 (0.679 – 1.213) | |
| Nc | 9168 | 9186 | 13,197 |
a Estimated using the formulae PR = OR/[(1-P0)+(P0*OR)] as suggested by Zhang & Yu [18]. b Confidence intervals were estimated reflecting design effect. c Number of observations is less than in descriptive because of missing values. ***P-value < 1%; **P-value < 5%; * P-value < 10%