2.3. Data source

Since 2004 IHVN has supported a network of over 500 health facilities across the 6 regions in Nigeria to provide HIV treatment and care to people living the virus. All patient-level data from the health facilities are transmitted and stored in the central database with over 2 million entries, managed by the data management team. The database covers all HIV patients who are receiving HIV treatment and care from 2004 to 2018. Individuals were consecutively enrolled at first contact with an HIV treatment center. Collected data includes demographics, height, weight, date of HIV diagnosis, date of initiating therapy, AIDS-defining events, antiretroviral treatment, BMI, blood pressure, CD4 cell counts, HIV ribonucleic acid measurements, and other laboratory investigations.