ABSTRACT
Aim: To describe the clinical and sociodemographic characteristics of a special regime (National Army) in two different Colombian municipalities, as well as to analyse possible risk factors and conditions that favour the contagion of COVID-19. Material and Methods: Ecological study, including 377 participants from different age groups. Sociodemographic data such as age, sex, place of residence, social habits, and clinical characteristics such as blood type, presence of symptoms, were collected to describe the prevalence of these aspects in the population suspected or confirmed with COVID-19, as well as the creation of comparative analyses among those characteristics. Results: The 52.7% of the participants were positive cases for COVID-19 and 47.3% were suspected cases with negative molecular tests;of the positive population 54.8% were symptomatic, in the negative population 11.79% were symptomatic;the mean age for the symptomatic positive cases was 25.94 ± 6.40 years, while the mean age for the negative cases was 23.94 ± 9.57 years, the mean duration of symptoms for the positive cases it was 4.51 ± 1.55 days, the mean duration of symptoms for negative cases was 4.80 ± 1.60 days;for positive cases the most predominant blood group was O + with 64.82%, for the group of negative cases the most prevalent blood group was O + with 63.48%. Conclusions: No relationship was found between the presence of blood groups and severity secondary to COVID-19 infection. No statistically significant differences were found in terms of the prevalence of clinical and / or sociodemographic characteristics with respect to the general population, a higher prevalence of social habits such as tobacco or cigarette consumption was found in positive patients with COVID-19 compared to the negative population. © 2021 Instituto de Altos Estudios de Salud Publica. All rights reserved.