Cathrine Axfors

Also affiliated with Karolinska Institutet, Stanford University

MedicineDecision Sciences

Pilot corpus only

This score is computed over theSindex pilot corpus and does not cover the full scientific literature. Scores are relative to papers we have ingested — papers, authors, and institutions outside the pilot are not represented. Methodology.

Top 1%percentile

9.4Author DataRank

Indexed papers

3in pilot corpus

datarank_citation_only_1hop_v6· scope data_onlyMethodology

Why this DataRank?

An author's DataRank is the sum of the DataRanks of all 3 indexed papers attributed to them. A prolific author with many moderate-impact papers can outrank one with a single high-impact paper.

Author scores recompute whenever paper DataRanks are refreshed, so this number lags the underlying paper scores by at most one batch run.

Read the full methodology →

The highest-impact dataset this researcher has shared, ranked by DataRank — the single contribution doing the most to lift their data-sharing standing.

Second versus first wave of COVID-19 deaths: Shifts in age distribution and in nursing home fatalities

Environmental Research(2021)10.1016/j.envres.2021.110856

Top 3%

6.1DataRank

Top 3%128 citations

Cathrine Axfors, John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis

Papers

Driven by 30 papers — median percentile 87. Top paper: “Second versus first wave of COVID-19 deaths: Shifts in age distribution and in nursing home fatalities”.

Second versus first wave of COVID-19 deaths: Shifts in age distribution and in nursing home fatalities

Environmental Research(2021)10.1016/j.envres.2021.110856

Top 3%

6.1DataRank

Top 3%128 citations

Cathrine Axfors, John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis

Age-stratified infection fatality rate of COVID-19 in the non-elderly population

Environmental Research(2023)10.1016/j.envres.2022.114655

N/A

2.4DataRank · unranked

122 citations

Cathrine Axfors, Alexandre Apostolatos, John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis, Angelo Maria Pezzullo

Causal and Associational Language in Observational Health Research: A Systematic Evaluation

American Journal of Epidemiology(2022)10.1093/aje/kwac137

N/A

2.3DataRank · unranked

85 citations

Sarah Wieten, Julia M. Rohrer, Onyebuchi A. Arah, Peter W. G. Tennant, Elizabeth A. Stuart +44 more

Infection fatality rate of COVID-19 in community-dwelling elderly populations

European Journal of Epidemiology(2022)10.1007/s10654-022-00853-w

Top 13%

1.6DataRank

Top 13%58 citations

John P. A. Ioannidis, Cathrine Axfors

Second versus first wave of COVID-19 deaths: shifts in age distribution and in nursing home fatalities

medRxiv(2020)10.1101/2020.11.28.20240366

Top 13%

1.6DataRank

Top 13%20 citations

Cathrine Axfors, Despina G. Contopoulos‐Ioannidis, John P. A. Ioannidis

Problems with evidence assessment in COVID-19 health policy impact evaluation: a systematic review of study design and evidence strength

BMJ Open(2022)10.1136/bmjopen-2021-053820

N/A

1.2DataRank · unranked

29 citations

Emma Clarke‐Deelder, Avi Feller, Emily R. Smith, Joshua A. Salomon, Benjamin MacCormack-Gelles +19 more

Problems with Evidence Assessment in COVID-19 Health Policy Impact Evaluation: A systematic review of study design and evidence strength

medRxiv(2021)10.1101/2021.01.21.21250243

N/A

0.889DataRank · unranked

11 citations

Emma Clarke‐Deelder, Avi Feller, Emily R. Smith, Joshua A. Salomon, Benjamin MacCormack-Gelles +19 more

Population-level COVID-19 mortality risk for non-elderly individuals overall and for non-elderly individuals without underlying diseases in pandemic epicenters

Environmental Research(2020)10.1016/j.envres.2020.109890

N/A

0.866DataRank · unranked

320 citations

Cathrine Axfors, John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis

Mortality outcomes with hydroxychloroquine and chloroquine in COVID-19 from an international collaborative meta-analysis of randomized trials

Nature Communications(2021)10.1038/s41467-021-22446-z

N/A

0.852DataRank · unranked

292 citations

Andreas M. Schmitt, Perrine Janiaud, Janneke van ’t Hooft, Sherief Abd-Elsalam, Ehab F. Abdo +100 more

Association of Convalescent Plasma Treatment With Clinical Outcomes in Patients With COVID-19

JAMA(2021)10.1001/jama.2021.2747

N/A

0.844DataRank · unranked

276 citations

Cathrine Axfors, Andreas M. Schmitt, Viktoria Gloy, Fahim Ebrahimi, Matthias Hepprich +8 more

Author Correction: Mortality outcomes with hydroxychloroquine and chloroquine in COVID-19 from an international collaborative meta-analysis of randomized trials

Nature Communications(2021)10.1038/s41467-021-23559-1

N/A

0.802DataRank · unranked

11 citations

Andreas M. Schmitt, Perrine Janiaud, Janneke van ’t Hooft, Sherief Abd-Elsalam, Ehab F. Abdo +100 more

Infection fatality rate of COVID-19 in community-dwelling populations with emphasis on the elderly: An overview

medRxiv(2021)10.1101/2021.07.08.21260210

N/A

0.637DataRank · unranked

12 citations

John P. A. Ioannidis, Cathrine Axfors

Change in age distribution of COVID-19 deaths with the introduction of COVID-19 vaccination

Environmental Research(2022)10.1016/j.envres.2021.112342

N/A

0.590DataRank · unranked

50 citations

Angelo Maria Pezzullo, Leonardo Villani, Francesco Andrea Causio, Cathrine Axfors, Stefania Boccia +3 more

Differential COVID-19 infection rates in children, adults, and elderly: Systematic review and meta-analysis of 38 pre-vaccination national seroprevalence studies

Journal of Global Health(2023)10.7189/jogh.13.06004

N/A

0.561DataRank · unranked

15 citations

Angelo Maria Pezzullo, Alexandre Apostolatos, Despina G. Contopoulos‐Ioannidis, John P. A. Ioannidis, Cathrine Axfors

Medical journal requirements for clinical trial data sharing: Ripe for improvement

PLOS Medicine(2021)10.1371/journal.pmed.1003844

N/A

0.553DataRank · unranked

39 citations

Maximilian Siebert, Claude Pellen, Jeanne Fabiola Gaba, Cathrine Axfors, Ioana Alina Cristea +7 more

Population-level COVID-19 mortality risk for non-elderly individuals overall and for non-elderly individuals without underlying diseases in pandemic epicenters

medRxiv(2020)10.1101/2020.04.05.20054361

N/A

0.510DataRank · unranked

29 citations

Cathrine Axfors, Despina G. Contopoulos‐Ioannidis, John P. A. Ioannidis

Author Correction: Mortality outcomes with hydroxychloroquine and chloroquine in COVID-19 from an international collaborative meta-analysis of randomized trials

Nature Communications(2024)10.1038/s41467-024-45360-6

N/A

0.479DataRank · unranked

9 citations

Andreas M. Schmitt, Perrine Janiaud, Janneke van ’t Hooft, Sherief Abd-Elsalam, Ehab F. Abdo +100 more

Lessons learnt from registration of biomedical research

Nature Human Behaviour(2023)10.1038/s41562-022-01499-0

N/A

0.425DataRank · unranked

16 citations

Cathrine Axfors, John P. A. Ioannidis, Stylianos Serghiou

Mapping and systematic appraisal of umbrella reviews in epidemiological research: a protocol for a meta-epidemiological study

Systematic Reviews(2023)10.1186/s13643-023-02265-7

N/A

0.373DataRank · unranked

11 citations

Robin D Brooker, Angelo Maria Pezzullo, Cathrine Axfors, Emmanuel A. Zavalis, John P. A. Ioannidis +1 more

Age-stratified infection fatality rate of COVID-19 in the non-elderly informed from pre-vaccination national seroprevalence studies

medRxiv(2022)10.1101/2022.10.11.22280963

N/A

0.365DataRank · unranked

5 citations

Cathrine Axfors, Alexandre Apostolatos, John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis, Angelo Maria Pezzullo

Few randomized trials in preterm birth prevention meet predefined usefulness criteria

Journal of Clinical Epidemiology(2023)10.1016/j.jclinepi.2023.08.016

N/A

0.345DataRank · unranked

9 citations

Charlotte E. van Dijk, Cathrine Axfors, Zarko Alfirevic, Martijn A. Oudijk, Ben W.J. Mol +3 more

Results reporting for clinical trials led by medical universities and university hospitals in the nordic countries was often missing or delayed

Journal of Clinical Epidemiology(2025)10.1016/j.jclinepi.2025.111710

N/A

0.292DataRank · unranked

6 citations

Susanne Wieschowski, Maia Salholz-Hillel, Love Ahnström, Tarik Suljic, Samruddhi Yerunkar +37 more

Research rigor and reproducibility in research education: A CTSA institutional survey

Journal of Clinical and Translational Science(2024)10.1017/cts.2024.10

N/A

0.205DataRank · unranked

2 citations

Mario Malicki, Steven N. Goodman, Cathrine Axfors

Results reporting for clinical trials led by medical universities and university hospitals in the Nordic countries was often missing or delayed

medRxiv(2024)10.1101/2024.02.04.24301363

N/A

0.165DataRank · unranked

2 citations

Susanne Wieschowski, Nicholas J. DeVito, Maia Salholz-Hillel, Love Ahnström, Till Brückner +37 more

Change in age distribution of COVID-19 deaths with the introduction of COVID-19 vaccination

medRxiv(2021)10.1101/2021.07.20.21260842

N/A

0.140DataRank · unranked

1 citations

Angelo Maria Pezzullo, Leonardo Villani, Francesco Andrea Causio, Cathrine Axfors, Despina G. Contopoulos‐Ioannidis +3 more

Mapping and systematic appraisal of umbrella reviews in biomedical literature: A protocol

Research Square(2022)10.21203/rs.3.rs-1790570/v1

N/A

0.104DataRank · unranked

1 citations

Robin D Brooker, Angelo Maria Pezzullo, Cathrine Axfors, Emmanuel A. Zavalis, John P. A. Ioannidis +1 more

Published Registry-Based Pharmacoepidemiologic Associations Show Limited Concordance with Agnostic Medication-Wide Analyses

SSRN Electronic Journal(2023)10.2139/ssrn.4326211

N/A

0DataRank · unranked

0 citations

John P. A. Ioannidis, Chirag J. Patel, Cathrine Axfors

Value of clinical research: Usefulness tool development and systematic review of 350 randomised controlled trials in preterm birth

(2021)10.22541/au.162437845.50400817/v1

N/A

0DataRank · unranked

0 citations

Charlotte van Dijk, Cathrine Axfors, Noah Haber, Zarko Alfirevic, John P. A. Ioannidis +4 more

Reply to: On meta-analytic models and the effect of hydroxychloroquine use in COVID-19

Nature Communications(2025)10.1038/s41467-025-60479-w

N/A

0DataRank · unranked

0 citations

Cathrine Axfors, David Moher, Steven N. Goodman, John P. A. Ioannidis, Lars G. Hemkens +1 more

Published registry-based pharmacoepidemiologic associations show limited concordance with agnostic medication-wide analyses

Journal of Clinical Epidemiology(2023)10.1016/j.jclinepi.2023.05.014

N/A

0DataRank · unranked

0 citations

Chirag J. Patel, John P. A. Ioannidis, Cathrine Axfors

Cathrine Axfors

Indexed papers

Top data-sharing exemplar

Papers