Cohort Profile: PISCIS, a population-based cohort of people living with HIV in Catalonia and Balearic Islands.

Duplicate patient registries were cross-referenced with each other through the patient registry within the Catalan Epidemiological Repository (REC) of the Catalan Department of Health, where all patients are categorized with a single identifiable number. Another strength is, as HIV patients must imperatively attend follow-up clinical visits to acquire ART, participants are rarely lost in follow-up (167 patients LTFU/1000 patient-years), which is exceedingly important in a cohort study. Therefore, the PISCIS Cohort is a national strategic information source, with the current objective of carrying out clinical-epidemiological and longitudinal surveillance of patients diagnosed with HIV, optimizing the comprehensive management of people living with HIV (PLWH) and answering clinical and epidemiological questions through nested research projects. Key Features The PISCIS Cohort is a prospective, population-based, longitudinal study of people living with HIV (PLWH) in Catalonia and the Balearic Islands (Spain), active since 1998 and with a coverage of HIV-diagnosed patients of 82% and 60%, respectively. [Extracted from the article]