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Inclusion criteria.
| Criterion | Inclusion |
|---|---|
| Year | 2000–2015 |
| Language | English |
| Geographic area | Low- and middle- income countries (based on the classification of the World Bank) |
| Outcome measured | Factors related to adolescent pregnancy or childbearing |
| Study population | Study group includes adolescents aged 10-19 |
| Study type | Qualitative, quantitative or mixed method |
