Association of socio-demographic risk factors with reported unplanned pregnancy in all sexually active women aged 15–24 years
| Socio-demographic factor | Women (n) | Unplanned pregnancy (%) | Crude OR (95% CI) | p | Adjusted OR* (95% CI) | p |
|---|---|---|---|---|---|---|
| Age (years) | ||||||
| <21 | 2242 | 21.3 | 1 | 1 | ||
| 21–22 | 1805 | 26.2 | 1.31 (1.13–1.51) | 1.41 (1.21–1.64) | ||
| 23–24 | 1473 | 29.0 | 1.51 (1.29–1.76) | <0.001 | 1.72 (1.46–2.03) | <0.001 |
| Ethnic group† | ||||||
| Sukuma | 4513 | 24.9 | 1 | 1 | ||
| Non-Sukuma | 1007 | 25.2 | 1.00 (0.84–1.20) | 0.98 | 1.04 (0.87–1.25) | 0.65 |
| Religion | ||||||
| Christian | 4886 | 25.2 | 1 | 1 | ||
| Other | 630 | 22.5 | 0.91 (0.75–1.12) | 0.38 | 0.87 (0.71–1.07) | 0.19 |
| Highest level of education | ||||||
| Secondary/higher | 898 | 16.6 | 1 | 1 | ||
| Primary | 4618 | 26.6 | 1.90 (0.57–2.29) | <0.001 | 2.77 (2.24–3.43) | <0.001 |
| Occupation† | ||||||
| Business | 708 | 28.8 | 1 | 1 | ||
| Housework/farming | 3935 | 26.8 | 0.97 (0.81–1.17) | 1.22 (1.01–1.47) | ||
| School/university | 521 | 4.4 | 0.11 (0.07–0.18) | 0.08 (0.05–0.12) | ||
| None/other | 335 | 27.5 | 0.98 (0.73–1.32) | <0.001 | 0.92 (0.68–1.24) | <0.001 |
| Time slept away in the past year | ||||||
| Never | 2903 | 25.0 | 1 | 1 | ||
| <1 month | 1789 | 24.4 | 0.94 (0.82–1.08) | 0.96 (0.84–1.11) | ||
| 1–3 months | 453 | 24.7 | 0.96 (0.76–1.21) | 0.94 (0.74–1.20) | ||
| >3 months | 375 | 26.9 | 1.04 (0.81–1.33) | 0.81 | 1.04 (0.81–1.35) | 0.89 |
| Marital status | ||||||
| Currently married | 3268 | 20.7 | 1 | 1 | ||
| Never married | 1695 | 30.0 | 1.58 (1.38–1.82) | 2.67 (2.28–3.13) | ||
| Previously married | 557 | 34.5 | 1.99 (1.63–2.42) | <0.001 | 2.01 (1.65–2.44) | <0.001 |
*Adjusted for independent socio-demographic risk factors for unplanned pregnancy: age, education and marital status.
†The Sukuma are the largest ethnic group in Tanzania, comprising 16% of the population, and they are the predominant group in north-western Tanzania.
‡Adjusted for all independent predictors of pregnancy listed in the first footnote, except for education.
CI, confidence interval; OR, odds ratio.