Age at first sex: understanding recent trends in African demographic surveys
Objectives: To describe recent trends in age at first sex in African countries, identifying and making due allowances for a variety of common reporting errors. Methods: Demographic and Health Surveys (DHS) data from six African countries conducting three or more surveys since 1985 were analysed usin...
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Published in | Sexually transmitted infections Vol. 80; no. suppl 2; pp. ii28 - ii35 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
England
BMJ Publishing Group Ltd
01.12.2004
BMJ Publishing Group LTD BMJ Group |
Subjects | |
Online Access | Get full text |
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Summary: | Objectives: To describe recent trends in age at first sex in African countries, identifying and making due allowances for a variety of common reporting errors. Methods: Demographic and Health Surveys (DHS) data from six African countries conducting three or more surveys since 1985 were analysed using survival analysis techniques, combining information on virginity status and retrospective reporting of age at first sex. Hazard analysis was used to separate the effects of reporting error and compositional change and to estimate true changes in sexual debut over time. A multistate life table analysis incorporating transition to first marriage allowed cohorts to be classified according to person years spent as virgins, as sexually active unmarried, and married. Results: Intersurvey comparisons generally suggested a slow secular rise in age at first sex. However, tracing birth cohorts between surveys revealed inconsistencies—median ages reported by female members of a birth cohort in their teens were generally higher than those reported when they reached their twenties, even when allowing for residence and education changes—probably a result of young, sexually active women denying they had ever had sex. Male birth cohorts tend to display the opposite kind of bias. Conclusions: Uganda, Kenya, and Ghana have experienced a more pronounced and unambiguous decline in premarital sexual activity than Tanzania, Zambia, and Zimbabwe, with statistically significant increases in age at first sex. In addition, Uganda has maintained a very short interval between onset of sexual activity and marriage for both sexes. |
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Bibliography: | istex:070D82DC5C765D40532C717422E5CE2C75EA0F45 ark:/67375/NVC-RGK7FC4M-7 Correspondence to: Ms B Zaba Centre for Population Studies, 49-51 Bedford Square, London WC1 B 3DP, UK; basia.zaba@lshtm.ac.uk href:sextrans-80-ii28.pdf local:0800028 PMID:15572637 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1368-4973 1472-3263 |
DOI: | 10.1136/sti.2004.012674 |