To control the Human Immunodeficiency Virus (HIV) pandemic, the World Health Organization (WHO) set the 90-90-90 target to be reached by 2020. One major threat to those goals is late
presentation, which is defined as an individual presenting a TCD4+ count lower than 350 cells/mm3
or an AIDS-defining event. The present study aims to identify determinants of late presentation in
Europe based on the EuResist database with HIV-1 infected patients followed-up between 1981 and
2019. Our study includes clinical and socio-demographic information from 89,851 HIV-1 infected
patients. Statistical analysis was performed using RStudio and SPSS and a Bayesian network was
constructed with the WEKA software to analyze the association between all variables. Among 89851
HIV-1 infected patients included in the analysis, the median age was 33 (IQR: 27.0–41.0) years and
74.4% were males. Of those, 28,889 patients (50.4%) were late presenters. Older patients (>56),
heterosexuals, patients originated from Africa and patients presenting with log VL >4.1 had a higher
probability of being late presenters (p < 0.001). Bayesian networks indicated VL, mode of transmission, age and recentness of infection as variables that were directly associated with LP. This study
highlights the major determinants associated with late presentation in Europe. This study helps to
direct prevention measures for this population