Observational studyJournal of medical Internet research2021
A Self-Assessment Web-Based App to Assess Trends of the COVID-19 Pandemic in France: Observational Study.
Observational study in Journal of medical Internet research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04331171 (Epidemiological Observation From a Smartphone Self-monitoring Application for Suspected COVID-19 Patients' Triage), which is not on this map. Cited by 11 papers, 1 of them a synthesis that pooled it.
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.
Epidemiological Observation From a Smartphone Self-monitoring Application for Suspected COVID-19 Patients' Triage
Who cites it
11 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.
- A Systematic Review of Health Management Mobile Applications in COVID-19 Pandemic: Features, Advantages, and Disadvantages.BioMed research international · 2024Pooled it
- Emergency Department Utilization and Patient Acuity in the Setting of Care-Seeking Hesitancy: Insights from the COVID-19 Pandemic.The western journal of emergency medicine · 2025Article
- Insights from Chilean NCDs Hospitalization Data during COVID-19.Medicina (Kaunas, Lithuania) · 2024Article
- A Digital-First Health Care Approach to Managing Pandemics: Scoping Review of Pandemic Self-triage Tools.Journal of medical Internet research · 2023Article
- Protection Motivation Perspective Regarding the Use of COVID-19 Mobile Tracing Apps Among Public Users: Empirical Study.JMIR formative research · 2023Article
- The Use of a Self-triage Tool to Predict COVID-19 Cases and Hospitalizations in the State of Georgia.The western journal of emergency medicine · 2022Article
- Early Detection of Neurodevelopmental Disorders of Toddlers and Postnatal Depression by Mobile Health App: Observational Cross-sectional Study.JMIR mHealth and uHealth · 2022Observational
- Patient Portal Messaging for Asynchronous Virtual Care During the COVID-19 Pandemic: Retrospective Analysis.JMIR human factors · 2022Article
- Autonomic dysfunction in SARS-COV-2 infection acute and long-term implications COVID-19 editor's page series.Journal of thrombosis and thrombolysis · 2021Review
- Olfactory Training and Visual Stimulation Assisted by a Web Application for Patients With Persistent Olfactory Dysfunction After SARS-CoV-2 Infection: Observational Study.Journal of medical Internet research · 2021Observational
- Analysis of COVID-19 Transmission Sources in France by Self-Assessment Before and After the Partial Lockdown: Observational Study.Journal of medical Internet research · 2021Observational
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundWe developed a self-assessment and participatory web-based triage app to assess the trends of the COVID-19 pandemic in France in March 2020.
objectiveWe compared daily large-scale RT-PCR test results to monitor recent reports of anosmia through a web-based app to assess the dynamics of emergency department visits, hospitalizations, and intensive care unit (ICU) admissions among individuals with COVID-19 in France.
methodsBetween March 21 and November 18, 2020, users of the maladiecoronavirus.fr self-triage app were asked questions about COVID-19 symptoms. Data on daily hospitalizations, large-scale positive results on RT-PCR tests, emergency department visits, and ICU admission of individuals with COVID-19 were compared to data on daily reports of anosmia on the app.
resultsAs of November 18, 2020, recent anosmia was reported 575,214 times from among approximately 13,000,000 responses. Daily anosmia reports during peak engagement with the app on September 16, 2020, were spatially correlated with the peak in daily COVID-19-related hospitalizations in November 2020 (Spearman rank correlation coefficient [ρ]=0.77; P<.001). This peak in daily anosmia reports was observed primarily among young adults (age range 18-40 years), being observed 49 days before the peak of hospitalizations that corresponded to the first wave of infections among the young population, followed by a peak in hospitalizations among older individuals (aged ≥50 years) in November 2020. The reduction in the daily reports of anosmia associated with the peaks in the number of cases preceded the reduction in daily hospitalizations by 10 and 9 days during the first and the second waves of infection, respectively, although the reduction in the positivity rates on RT-PCR tests preceded the reduction in daily hospitalizations by only 2 days during the second wave of infections.
conclusionsData on daily reports of anosmia collected through a nationwide, web-based self-assessment app can be a relevant tool to anticipate surges in outbreaks, hospitalizations, and ICU admission during the COVID-19 pandemic.
trial registrationClinicalTrials.gov NCT04331171; https://clinicaltrials.gov/ct2/show/NCT04331171.
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