To evaluate the associations between depressive symptoms, HIV vulnerability factors and oral pre-exposure prophylaxis (PrEP) use and adherence among adolescent girls and young women (AGYW) in Kenya.

Cross-sectional observational study.

Research site in Kisumu, Kenya.

300 AGYW aged 19–24 years (median age 21 years, IQR 20–22), attending follow-up visits in a randomised controlled trial of the efficacy of a single-dose HPV vaccine.

Participants responded to questionnaires assessing their depressive symptoms (Patient Health Questionnaire-9), HIV vulnerability and PrEP use and adherence.

Moderate to severe depressive symptoms were reported by 14.3% (95% CI 10.5% to 18.8%). Factors associated with increased prevalence of depressive symptoms included medium HIV risk perception (adjusted prevalence ratio (aPR) 2.25; 95% CI 1.20 to 4.26) and engaging in transactional sex (aPR 2.51; 95% CI 1.15 to 5.48). The rate of oral PrEP use was 19.3% (n=58, 95% CI 15.0% to 24.0%), with 43.0% reporting adherence (≥5 doses in the past week). Depressive symptoms were not significantly associated with PrEP use (aPR 0.94; 95% CI 0.52 to 1.70).

The high prevalence of depressive symptoms among AGYW highlights the importance of integrating mental health screening into HIV prevention services, particularly for individuals with higher HIV risk perception and those engaging in transactional sex.