Table 3. Prevalence, prevalence ratio, and 95% confidence interval for occurrence of sexual intercourse according to the variables studied. Research ADOLESCER, Bahia, Brazil, 2015.
| Variable | Total | Quilombola | Non-quilombola | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| P(%)* | Crude PR | IC95% | P(%)* | Crude PR | IC95% | P(%)* | Crude PR | IC95% | ||
| Quilombola | ||||||||||
| No | 25.1 | 1.00 | - | - | - | - | - | - | - | |
| Yes | 28.1 | 1.12 | 0.80–1.56 | - | - | - | - | - | - | |
| Sex | ||||||||||
| Male | 28.4 | 1.00 | - | 32.9 | 1.00 | - | 25.4 | 1.00 | - | |
| Female | 24.5 | 0.86 | 0.62–1.20 | 24.2 | 0.73 | 0.45–1.19 | 24.8 | 1.04 | 0.64–1.53 | |
| Race | ||||||||||
| Non-black | 18.5 | 1.00 | - | 33.3 | 1.00 | - | 12.3 | 1.00 | - | |
| Black | 28.9 | 1.56 | 0.98–2.50 | 27.1 | 0.81 | 0.47–1.48 | 30.4 | 2.60 | 1.24–4.93 | |
| Economy level | ||||||||||
| B or C | 27.2 | 1.00 | - | 32.5 | 1.00 | - | 25.2 | 1.00 | - | |
| D or E | 25.9 | 0.96 | 0.68–1.37 | 26.8 | 0.82 | 0.48–1.40 | 25.0 | 1.00 | 0.63–1.56 | |
| Current work | ||||||||||
| No | 18.7 | 1.00 | - | 21.1 | 1.00 | - | 16.5 | 1.00 | - | |
| Yes | 38.9 | 2.08 | 1.50–2.91 | 43.4 | 2.06 | 1.30–3.30 | 36.5 | 2.20 | 1.37–3.54 | |
| Currently attends school | ||||||||||
| No | 85.7 | 1.00 | - | 83.3 | 1.00 | - | 88.2 | 1.00 | - | |
| Yes | 20.6 | 0.25 | 0.20–0.32 | 21.5 | 0.27 | 0.19–0.37 | 19.9 | 0.26 | 0.20–0.31 | |
| Family composition | ||||||||||
| Live with both parents | 24.6 | 1.00 | - | 27.1 | 1.00 | - | 22.9 | 1.00 | - | |
| Only live with the father or mother | 24.2 | 1.02 | 0.64–1.50 | 24.4 | 0.90 | 0.48–1.70 | 24.0 | 1.08 | 0.59–1.85 | |
| Do not live with parents | 45.7 | 1.87 | 1.22–2.82 | 42.1 | 1.55 | 0.84–2.87 | 50.0 | 2.18 | 1.23–3.85 | |
| Frequency in which parents knew what they did in their free time | ||||||||||
| Most of the time/Always | 23.0 | 1.00 | - | 25.5 | 1.00 | - | 21.3 | 1.00 | - | |
| Sometimes | 27.1 | 1.18 | 0.75–1.85 | 29.0 | 1.14 | 0.60–2.18 | 25.6 | 1.21 | 0.65–2.25 | |
| Never/Rarely | 32.9 | 1.43 | 1.06–2.14 | 34.3 | 1.34 | 0.78–2.38 | 31.6 | 1.48 | 0.84–2.61 | |
| Frequency in which parents understood problems and concerns | ||||||||||
| Most of the time/Always | 20.3 | 1.00 | - | 22.9 | 1.00 | - | 18.3 | 1.00 | - | |
| Sometimes | 27.4 | 1.35 | 0.89–2.06 | 34.0 | 1.51 | 0.85–2.63 | 22.5 | 1.23 | 0.68–2.27 | |
| Never/Rarely | 32.7 | 1.61 | 1.06–2.45 | 27.9 | 1.22 | 0.64–2.33 | 36.4 | 2.00 | 1.14–3.47 | |
| Frequency in which parents looked into their things without permission | ||||||||||
| Most of the time/Always | 30.2 | 1.00 | – | 26.3 | 1.00 | – | 32.4 | 1.00 | – | |
| Sometimes | 29.3 | 0.97 | 0.55–1.72 | 30.0 | 1.14 | 0.42–3.13 | 29.0 | 0.90 | 0.46–1.80 | |
| Never/Rarely | 24.1 | 0.80 | 0.50–1.26 | 27.6 | 1.05 | 0.50–2.35 | 21.10 | 0.65 | 0.37–1.16 | |
| Close friends | ||||||||||
| < 3 | 25.8 | 1.00 | – | 14.8 | 1.00 | – | 33.3 | 1.00 | – | |
| ≥ 3 | 26.5 | 1.03 | 0.66–1.61 | 30.7 | 2.07 | 0.81–5.31 | 23.4 | 0.70 | 0.42–1.17 | |
| Felt alone | ||||||||||
| Never/Rarely | 23.1 | 1.00 | – | 26.2 | 1.00 | – | 20.7 | 1.00 | – | |
| Sometimes | 31.9 | 1.38 | 1.17–2.00 | 29.6 | 1.13 | 0.65–2.02 | 33.3 | 1.61 | 1.04–2.56 | |
| Most of the times/Always | 33.3 | 1.44 | 0.86–2.53 | 37.5 | 1.43 | 0.70–2.92 | 28.6 | 1.38 | 0.58–3.36 | |
| Alcohol use experimentation | ||||||||||
| No | 11.8 | 1.00 | – | 14.2 | 1.00 | – | 9.8 | 1.00 | – | |
| Yes | 63.6 | 5.41 | 3.80–7.68 | 72.5 | 5.11 | 3.20–8.18 | 58.6 | 6.00 | 3.60–10.1 | |
| Tobacco experimentation | ||||||||||
| No | 23.0 | 1.00 | – | 25.2 | 1.00 | – | 21.3 | 1.00 | – | |
| Yes | 90.0 | 3.92 | 3.09–5.00 | 87.5 | 3.48 | 2.40–5.07 | 91.7 | 4.30 | 3.15–5.87 | |
*
P(%): prevalence of sexual intercourse (in percentage).