Association of socio-demographic risk factors with unplanned pregnancy in all sexually active women
| 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 | 1976 | 30.2 | 1.59 (1.39–1.84) | <0.001 | 1.82 (1.56–2.12) | <0.001 |
| Ethnic group† | ||||||
| Sukuma | 4934 | 25.6 | 1 | 1 | ||
| Non-Sukuma | 1090 | 26.2 | 1.03 (0.87–1.22) | 0.70 | 1.08 (0.91–1.29) | 0.37 |
| Religion | ||||||
| Christian | 5313 | 25.9 | 1 | 1 | ||
| Other | 706 | 23.9 | 0.96 (0.79–1.16) | 0.64 | 0.91 (0.75–1.11) | 0.36 |
| Highest level of education | ||||||
| Secondary/higher | 912 | 16.6 | 1 | 1 | ||
| Primary | 5108 | 27.3 | 1.97 (1.63–2.37) | <0.001 | 2.79 (2.26–3.44) | <0.001 |
| Occupation‡ | ||||||
| Business | 769 | 29.8 | 1 | 1 | ||
| Housework/farming | 4360 | 27.5 | 0.95 (0.80–1.13) | 1.18 (0.99–1.41) | ||
| School/university | 522 | 4.4 | 0.11 (0.07–0.17) | 0.08 (0.05–0.12) | ||
| None/other | 351 | 27.4 | 0.93 (0.70–1.24) | <0.001 | 0.87 (0.65–1.16) | <0.001 |
| Time slept away in the past year | ||||||
| Never | 3193 | 25.6 | 1 | 1 | ||
| <1 month | 1949 | 25.5 | 0.97 (0.85–1.10) | 0.99 (0.87–1.13) | ||
| 1–3 months | 480 | 25.4 | 0.97 (0.78–1.21) | 0.96 (0.76–1.21) | ||
| >3 months | 402 | 28.1 | 1.07 (0.85–1.36) | 0.85 | 1.08 (0.85–1.38) | 0.88 |
| Marital status | ||||||
| Currently married | 3660 | 21.6 | 1 | 1 | ||
| Never married | 1739 | 30.5 | 1.54 (1.35–1.76) | 2.67 (2.29–3.11) | ||
| Previously married | 625 | 35.8 | 1.99 (1.66–2.39) | <0.001 | 2.01 (2.26–3.44) | <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.