Lars G. Hemkens

Also affiliated with Bern University of Applied Sciences, University of Basel, University Hospital of Basel, Stanford University

Decision SciencesEconomics, Econometrics and FinanceMedicineMathematics

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

8.2Author DataRank

Indexed papers

2in 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 2 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.

Agreement of treatment effects for mortality from routinely collected data and subsequent randomized trials: meta-epidemiological survey

BMJ(2016)10.1136/bmj.i493

Top 2%

7.3DataRank

Top 2%226 citations

John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis, Lars G. Hemkens

Papers

Driven by 24 papers — median percentile 88. Top paper: “Agreement of treatment effects for mortality from routinely collected data and subsequent randomized trials: meta-epidemiological survey”.

Agreement of treatment effects for mortality from routinely collected data and subsequent randomized trials: meta-epidemiological survey

BMJ(2016)10.1136/bmj.i493

Top 2%

7.3DataRank

Top 2%226 citations

John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis, Lars G. Hemkens

Clinical Trial Evidence Supporting US Food and Drug Administration Approval of Novel Cancer Therapies Between 2000 and 2016

JAMA Network Open(2020)10.1001/jamanetworkopen.2020.24406

N/A

4.3DataRank · unranked

97 citations

Andreas M. Schmitt, Benjamin Speich, Florian Naudet, Arnav Agarwal, Tiago V. Pereira +12 more

Challenges and Lessons Learned From COVID-19 Trials: Should We Be Doing Clinical Trials Differently?

Canadian Journal of Cardiology(2021)10.1016/j.cjca.2021.05.009

N/A

2.3DataRank · unranked

63 citations

Lars G. Hemkens, John P. A. Ioannidis, Perrine Janiaud

The Comparative Effectiveness of Innovative Treatments for Cancer (CEIT-Cancer) project: Rationale and design of the database and the collection of evidence available at approval of novel drugs

Trials(2018)10.1186/s13063-018-2877-z

Top 22%

0.899DataRank

Top 22%23 citations

Benjamin Speich, Florian Naudet, Arnav Agarwal, Francesco Sclafani, Juan Martin-Liberal +9 more

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

Routinely collected data for randomized trials: promises, barriers, and implications

Trials(2018)10.1186/s13063-017-2394-5

N/A

0.718DataRank · unranked

119 citations

Rustam Al-Shahi Salman, Shaun Treweek, Heidi Gardner, Daniel Strech, William Whiteley +4 more

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

Single pivotal trials with few corroborating characteristics were used for FDA approval of cancer therapies

Journal of Clinical Epidemiology(2019)10.1016/j.jclinepi.2019.05.033

N/A

0.477DataRank · unranked

23 citations

Benjamin Speich, Matthias Briel, Francesco Sclafani, Heiner C. Bucher, Arnav Agarwal +5 more

Current use of routinely collected health data to complement randomized controlled trials: a meta-epidemiological survey

CMAJ Open(2016)10.9778/cmajo.20150036

N/A

0.464DataRank · unranked

21 citations

Lars G. Hemkens, Despina G. Contopoulos‐Ioannidis, John P. A. Ioannidis

Nonrandomized studies using causal-modeling may give different answers than RCTs: a meta-epidemiological study

Journal of Clinical Epidemiology(2020)10.1016/j.jclinepi.2019.10.012

N/A

0.442DataRank · unranked

18 citations

Aviv Ladanie, Kimberly Mc Cord, Heiner C. Bucher, Lars G. Hemkens, John P. A. Ioannidis +1 more

Marginal structural models and other analyses allow multiple estimates of treatment effects in randomized clinical trials: Meta-epidemiological analysis

Journal of Clinical Epidemiology(2019)10.1016/j.jclinepi.2018.11.001

N/A

0.373DataRank · unranked

11 citations

Benjamin Speich, Aviv Ladanie, Heiner C. Bucher, Lars G. Hemkens, John P. A. Ioannidis +1 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

0.360DataRank · unranked

10 citations

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

Robustness of reported postacute health outcomes in children with SARS-CoV-2 infection: a systematic review

Archives of Disease in Childhood(2022)10.1136/archdischild-2022-324455

N/A

0.330DataRank · unranked

8 citations

Perrine Janiaud, Stefan Schandelmaier, Tiago V. Pereira, Steven N. Goodman, John P. A. Ioannidis +5 more

Methods proposed for monitoring the implementation of evidence-based research: a cross-sectional study

Journal of Clinical Epidemiology(2024)10.1016/j.jclinepi.2024.111247

N/A

0.290DataRank · unranked

5 citations

Małgorzata M. Bala, Joanna Zając, Tomislav Meštrović, Sandra Buttigieg, Mary Yanakoulia +39 more

Concordance of effects of medical interventions on hospital admission and readmission rates with effects on mortality

Canadian Medical Association Journal(2013)10.1503/cmaj.130430

N/A

0.241DataRank · unranked

4 citations

Despina G. Contopoulos‐Ioannidis, John P. A. Ioannidis, Lars G. Hemkens

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

Benchmarking Human-AI Collaboration for Common Evidence Appraisal Tools

medRxiv(2024)10.1101/2024.04.21.24306137

N/A

0.165DataRank · unranked

2 citations

Julian Hirt, Perrine Janiaud, Ludwig Kappos, John P. A. Ioannidis, Lars G. Hemkens +1 more

Validity of reported post-acute health outcomes in children with SARS-CoV-2 infection: a systematic review

medRxiv(2022)10.1101/2022.03.18.22272582

N/A

0.165DataRank · unranked

2 citations

Perrine Janiaud, Viktoria Gloy, Stefan Schandelmaier, Tiago V. Pereira, Despina G. Contopoulos‐Ioannidis +5 more

Off-label prescription: experience is a gloomy lantern that does not even illuminate its bearer. Author response

Journal of Clinical Epidemiology(2018)10.1016/j.jclinepi.2018.05.012

N/A

0DataRank · unranked

0 citations

Randall S. Stafford, Hannah Ewald, Heiner C. Bucher, Lars G. Hemkens, John P. A. Ioannidis +1 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

Prediction of RECRUITment In randomized clinical Trials (RECRUIT-IT)-rationale and design for an international collaborative study [study protocol].

BORIS (University Library Bern)(2020)10.7892/boris.146085

N/A

0DataRank · unranked

0 citations

Junhao Liu, Yu Jiang, Byron J. Gajewski, Cen Wu, Erik von Elm +20 more

Authors’ reply to Pérol and colleagues

BMJ(2016)10.1136/bmj.i6747

N/A

0DataRank · unranked

0 citations

John P. A. Ioannidis, Despina G. Contopoulos‐Ioannidis, Lars G. Hemkens

Lars G. Hemkens

Indexed papers

Top data-sharing exemplar

Papers