Table 4.
Multivariate prevalence ratiosa (CI 95%) for condom use and participation in compensated sexb.
| Variable | Categories | PR of condom use | PR of compensated sex |
| Age | 15 – 18 | 1.0 | 1.0 |
| 19 – 21 | 1.024 (0.818 – 1.228) | 1.446 (0.607 – 2.149) | |
| Years of sexual activity | < 1 year | 1.0 | 1.0 |
| 2 to 3 | 1.008 (0.812 – 1.184) | 0.530 (0.141 – 0.932)*** | |
| 4 or more | 0.018 (0.837 – 1.152) | 0.700 (0.291 – 1.241) | |
| Sex | Women | 1.0 | 1.0 |
| Men | 1.744 (1.534 – 1.912)*** | 0.928 (0.586 – 1.139) | |
| Socioeconomic level | Lowest 20% | 1.0 | 1.0 |
| Second lower 20% | 1.101 (1.002 – 1.173)** | 0.875 (0.487 – 1.058) | |
| Remaining 60% | 1.062 (0.969 – 1.106) | 0.929 (0.480 – 1.025) | |
| Adolescent attending to school | No | 1.0 | 1.0 |
| Yes | 0.963 (0.741 – 1.099) | 0.961 (0.672 – 1.046) | |
| Education level standard for age | No | 1.0 | 1.0 |
| Yes | 0.927 (0.762 – 1.025) | 1.007 (0.737 – 1.072) | |
|
Educational gap of adolescents not attending school and with education level not standard for age |
No gap | 1.0 | 1.0 |
| Years of gap | 1.011 (0.997 – 1.024) | 0.994 (0.942 – 1.037) | |
| Report labor activities | No | 1.0 | 1.0 |
| Yes | 0.861 (0.586 – 1.153) | 1.035 (0.700 – 1.262) | |
| Attending school and report labor activities | No | 1.0 | |
| Yes | 1.072 (1.009 – 1.093)** | ||
| Living with a partner | No | 1.0 | 1.0 |
| Yes | 0.686 (0.511 – 0.864)*** | 0.808 (0.317 – 1.354) | |
| Count with a close friend | No | 1.0 | 1.0 |
| Yes | 1.197 (0.785 – 1.729) | 0.377 (0.098 – 0.987)** | |
| Drinks alcohol | No | 1.0 | 1.0 |
| Yes | 0.923 (0.772 – 1.050) | 0.875 (0.459 – 1.092) | |
| Smokes | No | 1.0 | 1.0 |
| Yes | 0.991 (0.838 – 1.097) | 0.969 (0.618 – 1.073) | |
| Reported STI symptoms | No | 1.0 | 1.0 |
| Yes | 0.982 (0.917 – 1.005) | 0.999 (0.865 – 1.015) | |
| Geographical area of residence | Center | 1.0 | 1.0 |
| Golf | 1.082 (0.950 – 1.177) | 1.033 (0.642 – 1.224) | |
| North | 1.061 (0.908 – 1.157) | 1.102 (0.512 – 1.319) | |
| North Pacific | 0.987 (0.929 – 1.015) | 0.942 (0.620 – 0.995)*** | |
| Central Pacific | 1.046 (0.961 – 1.099) | 1.183 (0.897 – 1.290) | |
| South Pacific | 1.104 (1.012 – 1.161)** | 0.970 (0.685 – 1.049) | |
| Yucatan peninsula | 1.003 (0.976 – 1.015) | 1.022 (0.901 – 1.046) | |
| Nc | 2067 | 2347 |
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%