Comparing HIV Testing Patterns Among Adolescent Girls, Young Women, and Older Women in Nigeria: A Comparative Analysis and Socioecological Correlates

Background HIV testing is a key entry point for prevention and treatment in Nigeria, yet age-related disparities persist. Adolescent girls and young women (AGYW) are disproportionately affected by HIV but often demonstrate lower uptake of testing services. This study examined differences in HIV self-testing awareness, use, and antenatal HIV testing between AGYW and older women, the distribution of HIV testing service uptake, and identified multilevel factors associated with HIV self-test awareness and testing among AGYW. Methods This study analyzed cross-sectional data from the 2023-2024 Nigeria Demographic and Health Survey (NDHS), including women aged 15-49 years. Descriptive statistics were used to assess differences in HIV self-testing awareness, use, antenatal HIV testing, and place of HIV testing between Adolescent Girls and Young Women (AGYW) (15-24 years) and older women (25-49 years). Among AGYW, bivariate and multivariate logistic regression were conducted to identify socioecological factors associated with HIV self-testing, awareness and use. Results A total of 14,708 AGYW and 24,342 older women were included in the analysis. The median age of AGYW was 19 years (IQR: 17-22), compared to 35 years (IQR: 25-41) among older women. Older women reported significantly higher awareness of HIV self-testing (13.1%) compared to AGYW (8.8%). Use of the HIV self-testing kit was low overall but higher among older women (2.3%) than among AGYW (1.1%). Older women reported greater uptake of antenatal HIV testing (57.9%) than AGYW (48.4%). Education, wealth, and internet use were positively associated with awareness, while AGYW aged 15-19 had significantly lower odds of awareness than AGYW women aged 20- 24. Regional disparities were also observed in the awareness and use of HIV self-test kits. Conclusions Findings support that targeted, AGYW-centred strategies are needed to improve equitable access to HIV testing and achieve national and global HIV prevention goals.