ObjectiveTo summarise the unfolding of the COVID-19 epidemic among slum dwellers and different social strata in the city of Buenos Aires during the first 20 weeks after the first reported case.DesignObservational study using a time-series analysis. Natural experiment in a big city.SettingPopulation of the city of Buenos Aires and the integrated health reporting system records of positive RT-PCR for COVID-19 tests.ParticipantsRecords from the Argentine Integrated Health Reporting System for all persons with suspected and RT-PCR-confirmed diagnosis of COVID-19 between 31 January and 14 July 2020.OutcomesTo estimate the effects of living in a slum on the standardised incidence rate of COVID-19, corrected Poisson regression models were used. Additionally, the impact of socioeconomic status was performed using an ecological analysis at the community level.ResultsA total of 114 052 people were tested for symptoms related with COVID-19. Of these, 39 039 (34.2%) were RT-PCR positive. The incidence rates for COVID-19 towards the end of the 20th week were 160 (155 to 165) per 100 000 people among the inhabitants who did not reside in the slums (n=2 841 997) and 708 (674 to 642) among slums dwellers (n=233 749). Compared with the better-off socioeconomic quintile (1.00), there was a linear gradient on incidence rates: 1.36 (1.25 to 1.46), 1.61 (1.49 to 1.74), 1.86 (1.72 to 2.01), 2.94 (2.74 to 3.16) from Q2 to Q5, respectively. Slum dwellers were associated with an incidence rate of 14.3 (13.4 to 15.4).ConclusionsThe distribution of the epidemic is socially conditioned. Slum dwellers are at a much higher risk than the rest of the community. Slum dwellers should not be considered just another risk category but an entirely different reality that requires policies tailored to their needs.

Objective. Evaluate primary health care functions from the perspective of patients with tuberculosis from slums in the city of Buenos Aires, Argentina. Methods. Cross-sectional observational study with adult patients with tuberculosis (TB) and without TB (NoTB), living in slums (S) and outside them (NoS). Participants’ perceptions were evaluated using the Primary Care Assessment Tool for users (abbreviated version), which measures four main domains (first contact, ongoing care, coordination with specialists, and comprehensiveness) and selected secondary domains. A Likert scale was used, ranging from “No, not at all” (1 point) to “Yes, definitely” (4 points). Scores ≥ 3 were considered to indicate adequate performance of functions. Averages were calculated for each domain, as well as two overall scores: with and without secondary domains. Results. 83 participants were included (20 TB-S, 21 TB-NoS, 19 NoTB-S, and 23 NoTB-NoS). The evaluated functions were perceived as inadequate. The TB-S group gave the lowest overall scores, not reaching 3 points in any domain. There were no significant differences in domains or overall scores between groups. Participants with TB gave lower scores in all domains, except in family-centered care, where they gave a significantly higher score than NoTB participants. The overall score without secondary domains was lower for TB participants than for the NoTB groups. Conclusions. According to the perception of participants with TB and without TB, primary health care functions are not satisfactory, either in slums or outside them.

Objetivo. Evaluar las funciones de la atención primaria de salud desde la perspectiva de los pacientes con tuberculosis (TB) provenientes de villas de emergencia de la Ciudad Autónoma de Buenos Aires, Argentina. Métodos. Estudio observacional transversal con pacientes adultos con TB y sin TB (NoTB), residentes en villas de emergencia (V) y fuera de ellas (NoV). La percepción de los participantes se evaluó mediante el cuestionario Primary Care Assessment Tool-usuarios (versión abreviada) que mide cuatro dimensiones principales (primer contacto, longitudinalidad de los cuidados, coordinación entre servicios e integralidad) y algunas secundarias. Se utilizó una escala de Likert, desde “No, en absoluto” (1 punto) hasta “Sí, sin duda” (4 puntos). Puntajes ≥ 3 se consideraron como cumplimiento adecuado de las funciones. Se calcularon promedios para cada dominio y dos puntajes globales: con y sin dominios secundarios. Resultados. Se incluyeron 83 participantes (20 TB-V, 21 TB-NV, 19 NoTB-V y 23 NoTB-NV). Las funciones evaluadas se percibieron como no adecuadas. El grupo TB-V tuvo los puntajes globales más bajos y en ningún dominio alcanzó 3 puntos. No hubo diferencias significativas en los dominios ni los puntajes globales entre grupos. Los participantes con TB dieron menores puntajes en todos los dominios, excepto en enfoque familiar que fue significativamente mayor que los de los participantes NoTB; el puntaje global sin dominios secundarios fue menor en los participantes con TB que en los NoTB. Conclusiones. Según la percepción de los participantes con TB y sin TB, las funciones de la atención primaria de salud no son satisfactorias, tanto dentro de las villas de emergencia como fuera de ellas.

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