ArticleBMJ open2023
Cumulative incidence of SARS-CoV-2 infection within the homeless population: insights from a city-wide longitudinal study.
Article in BMJ open, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04408131 (Morbi-mortality by COVID-19 Among Homeless People in Marseille), which is not on this map. Cited by 9 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Morbi-mortality by COVID-19 Among Homeless People in Marseille: a Cohort Study
Who cites it
9 citing papers in PubMed, 9 citations in OpenAlex.
- Equity challenges in public health responses during the COVID-19 Pandemic: mixed-methods study of Travellers' experiences in Nouvelle-Aquitaine, France.International journal for equity in health · 2026Article
- Article
- Leveraging paired serology to estimate the incidence of typhoidal Salmonella infection in the STRATAA study.PLoS neglected tropical diseases · 2025Article
- Article
- Reviving health mediation during the COVID-19 crisis and beyond: an implementation study in deprived neighbourhoods of Marseille, France.Frontiers in public health · 2024Article
- [Health of homeless individuals during the COVID-19 pandemic].Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz · 2023Review
- Incidence of SARS-CoV-2 Infection Among People Experiencing Homelessness in Toronto, Canada.JAMA network open · 2023Article
- Article
- Morbidity and mortality in a prospective cohort of people who were homeless during the COVID-19 pandemic.Frontiers in public health · 2023Observational
Corrections and comments
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Authors and funding
12 authors at 6 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesThe aim of this study was to determine the risk factors associated with SARS-CoV-2 infection in a cohort of homeless people using survival analysis. Seroprevalence in the homeless community was also compared with that of the general population.
designCohort study.
settingData were collected across two testing sessions, 3 months apart, during which each participant was tested for anti-SARS-CoV-2 antibodies and completed a face-to-face survey.
participantsAll homeless adults sleeping rough, in slums or squats, in emergency shelters or transitional accommodation in Marseille were eligible. PRIMARY OUTCOME MEASURES: Occurrence of a seroconversion event defined as a biologically confirmed SARS-CoV-2 infection. Local data from a national seroprevalence survey were used for comparison between homeless people and the general population.
resultsA total of 1249 people were included. SARS-CoV-2 seroprevalence increased from 6.0% (4.7-7.3) during the first session to 18.9% (16.0-21.7) during the second one, compared with 3.0% (1.9-4.2) and 6.5% (4.5-8.7) in the general population. Factors significantly associated with an increased risk of COVID-19 infection were: having stayed in emergency shelters (1.93 (1.18-3.15)), being an isolated parent (1.64 (1.07-2.52)) and having contact with more than 5-15 people per day (1.84 (1.27-2.67)). By contrast, smoking (0.46 (0.32-0.65)), having financial resources (0.70 (0.51-0.97)) and psychiatric or addictive comorbidities (0.52 (0.32-0.85)) were associated with a lower risk.
conclusionWe confirm that homeless people have higher infection rates than the general population, with increased risk in emergency shelters. There is growing evidence that, in addition to usual preventive measures, public policies should pay attention to adapt the type of accommodation and overall approach of precariousness. TRIAL REGISTRATION NUMBER: NCT04408131.
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