Evidence map›Paper›PMID 34772922›Full record

ArticleNature communications2021

Burdens of post-acute sequelae of COVID-19 by severity of acute infection, demographics and health status.

Yan Xie, Benjamin Bowe, Ziyad Al-Aly

3 registry-linked trialsOpen access · goldAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 196 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
196citing papers in PubMed, 6 pooled it
30.0field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

NCT06147050 phase3unknown statusnot on this mapstarted 2024, after this paper: background citation

Pilot Study of an Adaptive, Double-blind, Randomized, Placebo-controlled Study to Evaluate the Effect of Metformin in Reducing Fatigue in Long COVID Adolescent Patients With Chronic Fatigue Syndrome

TypeinterventionalSponsorPurpose Life SciencesRan2024 to 2024Enrolled16ConditionsLong COVIDArmsMetformin, Placebo
NCT06821087 phase2completednot on this mapstarted 2025, after this paper: background citation

Evaluating the Neuromodulatory Effect of Ketamine in Long COVID: A Pilot Study Targeting Fatigue and Neurocognitive Symptoms

TypeinterventionalSponsorUniversity of Texas at AustinRan2025 to 2026Enrolled20ConditionsLong COVIDArmsKetamine only
NCT06940609 phase2recruitingnot on this mapstarted 2025, after this paper: background citation

Magnetic Resonance Analysis of Neural Inflammatory Factors and External Stimulation (MANIFEST)

TypeinterventionalSponsorUniversity of New MexicoRan2025 to 2029Enrolled60ConditionsLong COVID, Long COVID Syndrome, Long COVID-19 Syndrome, PASCArmsaccelerated intermittent theta burst stimulation
3 · Its place in the literature

Who cites it

196 citing papers in PubMed, 6 syntheses or guidelines pooled it, 323 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. ESCMID rapid guidelines for assessment and management of long COVID.Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases · 2022
    Guideline
  7. Long COVID After Bamlanivimab Treatment.The Journal of infectious diseases · 2023
    Trial
  8. Trial
  9. Metformin and Severe Post-COVID-19 Outcomes Among Individuals with Diabetes Mellitus.medRxiv : the preprint server for health sciences · 2026
    Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Observational
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Association of COVID-19 Severity with Comorbidities: Results from the World Trade Center Health Registry.International journal of environmental research and public health · 2025
    Article

136 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 1 country.

Yan XieClinical Epidemiology Center, Research and Development Service, VA Saint Louis Health Care System, Saint Louis, MO, USA.ORCID 0000-0002-2457-9382
Benjamin BoweClinical Epidemiology Center, Research and Development Service, VA Saint Louis Health Care System, Saint Louis, MO, USA.
Ziyad Al-AlyClinical Epidemiology Center, Research and Development Service, VA Saint Louis Health Care System, Saint Louis, MO, USA. zalaly@gmail.com.ORCID 0000-0002-2600-0434
VA St. Louis Health Care System · USWashington University in St. Louis · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Post-Acute Sequelae of SARS-CoV-2 infection (PASC) have been characterized; however, the burden of PASC remains unknown. Here we used the healthcare databases of the US Department of Veterans Affairs to build a cohort of 181,384 people with COVID-19 and 4,397,509 non-infected controls and estimated that burden of PASC-defined as the presence of at least one sequela in excess of non-infected controls-was 73.43 (72.10, 74.72) per 1000 persons at 6 months. Burdens of individual sequelae varied by demographic groups (age, race, and sex) but were consistently higher in people with poorer baseline health and in those with more severe acute infection. In sum, the burden of PASC is substantial; PASC is non-monolithic with sequelae that are differentially expressed in various population groups. Collectively, our results may be useful in informing health systems capacity planning and care strategies of people with PASC.

Indexed as

AgedCohort StudiesCOVID-19Databases, FactualDisease ProgressionFemaleHealth StatusHumansInfectionsMaleMiddle AgedPost-Acute COVID-19 SyndromeSARS-CoV-2Severity of Illness IndexUnited StatesVeterans Health Services

Identifiers

PMID34772922
PMCPMC8589966
OpenAlexW3212377033

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.