Academic Director of Clinical Trials @ DCR Bern // U Bern || RT/like no endorsement

Berne, Switzerland
Joined June 2016
Replying to @GuyattGH
@GuyattGH opening the #EBHC206 conference on Evidence based Healthcare in Taormina, Sicily
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Lars G. Hemkens retweeted
On October 20th, the global health community comes together to mark World Evidence-Based Healthcare (EBHC) Day, a day dedicated to championing the role of research evidence in healthcare. We have written a detailed blog post for this occasion here: bit.ly/4ydrNjv
📣 The countdown is on! 7 days to go until World Evidence-Based Healthcare Day! 📣 Share your celebrations with us on social media. Tag us @WorldEBHCDay #WorldEBHCDay! Learn more about this year's theme 👇 worldebhcday.org/2026-campai… #WorldEBHCDay #EBHC
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.@OSFramework’s #OSF will no longer accept new code, data after 16 Nov. Files available on the site will remain but users will no longer be able to upload new materials, and all existing private files will be made public after the change nature.com/articles/d41586-0… @DalmeetS @Nature
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Lars G. Hemkens retweeted
💬 Editorial by Jeffrey L. Saver, MD: In #AcuteIschemicStroke, reperfusion therapies now reopen most occluded arteries, but many patients still have disabling outcomes after treatment. The LAIS trial indicates that loberamisal may improve 3-month disability-free recovery in patients who were not eligible for endovascular thrombectomy, supporting continued evaluation of #Neuroprotection alongside reperfusion strategies. ja.ma/4dsyab6
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Lars G. Hemkens retweeted
Among patients with #AcuteIschemicStroke treated within 48 hours of symptom onset, intravenous #Loberamisal was associated with a higher likelihood of full functional outcome at 90 days vs placebo. Adverse events, serious adverse events, and mortality were similar between groups, supporting further evaluation of neuroprotective and neuroreparative therapy in stroke care. 🔗 Read the full article: ja.ma/4dsy972
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Lars G. Hemkens retweeted
💬 Editorial by @JAMAplusTrials Editor in Chief Alison J. Huang, MD, MAS, Thomas G. Travison, PhD, and JAMA Senior Editor Derek C. Angus, MD, MPH: #PragmaticTrials are intended to support real-world clinical decision-making, but the term is used inconsistently across studies. A pragmatic orientation may improve the applicability of #ClinicalTrials to routine care, yet it does not justify weaker methods or reduced rigor. 📣 This September’s JAMA+ Trials Theme of the Month examines ongoing confusion and debate in pragmatic trial research, including how eligibility, intervention delivery, outcome assessment, and analysis align with pragmatic goals. Clearer design and reporting may help clinicians and health systems judge whether trial findings are usable in practice. 🔗 ja.ma/4gO0FCx
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Lars G. Hemkens retweeted
💬 Editorial by @JAMAplusTrials Editor in Chief Alison J. Huang, MD, MAS, Thomas G. Travison, PhD, and JAMA Senior Editor Derek C. Angus, MD, MPH: #PragmaticTrials are intended to support real-world clinical decision-making, but the term is used inconsistently across studies. A pragmatic orientation may improve the applicability of #ClinicalTrials to routine care, yet it does not justify weaker methods or reduced rigor. 📣 This September’s JAMA+ Trials Theme of the Month examines ongoing confusion and debate in pragmatic trial research, including how eligibility, intervention delivery, outcome assessment, and analysis align with pragmatic goals. Clearer design and reporting may help clinicians and health systems judge whether trial findings are usable in practice. 🔗 ja.ma/4x2jpmk
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Lars G. Hemkens retweeted
3,434 held-out Cochrane reviews. Median specificity 0.902 at 99% recall. The model runs locally: no per-abstract cost, no data leaving the machine. Method paper in press at JCE. Screening no longer decides what a small team can attempt. Disclosure: co-founder, I hold equity. youtube.com/watch?v=JxQTnsBo… coresr.ai/
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No universally accepted methodology standards currently provide direction for investigators to describe and use usual care in research studies. This article informs the research community about the new methodology standards developed by PCORI bmj.com/content/394/bmj-2026…
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Lars G. Hemkens retweeted
Sample size must align with statistical design – explanatory vs pragmatic – and with the #MinimalImportantDifference. Flaws in estimating parameters leads to underpowered trials. This paper describes a novel method for calculating sample size for pragmatic #RCTs. pubmed.ncbi.nlm.nih.gov/4238…
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Lars G. Hemkens retweeted
A new AHA scientific statement says up to 5 cups is good for the heart. That is not good science. I explain here.
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Pragmatic trials should tell which treatment to choose - but they use testing logic for power calc. We propose decision-analytic sample size based on γ error: the risk of choosing wrong treatment In simulations: roughly half as many pts needed. @JClinEpi doi.org/10.1016/j.jclinepi.2…
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Lars G. Hemkens retweeted
Just published: How we should be educating clinicians in #EBM concepts in 2026. Includes guidance to put much less emphasis on critical appraisal and much more on understanding magnitudes of effect and quality of evidence, and use of #AI in education. ebm.bmj.com/content/early/20…
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Lars G. Hemkens retweeted
Is AI better at reading EKGs than your doctor? A new NY Times story and Nature Medicine paper unpacked
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I also created a version of the 'guess the correlation' game. Students always enjoyed it, but the original website (with fun retro design) started to require a google account login. So I created my own version. Play it here: lakens.github.io/statistical…
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We talk too much about poor evidence than about root causes. "Evidence of moderate and lower quality may be equally prone to being unstable and cannot indicate if available effect estimates are true, exaggerated, or underestimated." Our paper @JClinEpi sciencedirect.com/science/ar…
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Peer review has been unwell for years. Now it needs intensive care. Instead of AI fixes or cutting applications, consider structural alternatives: - Fund researchers long term, not projects. Give them time to build vs draft applications - Use lottery mechanisms
Announced by the ERC today (really bad news for science!!! It starts in Europe but will affect everybody) Because the REVIEWING LOAD is so bad, if your application fails you may need to wait mulitple years (>3?!?) until you can submit again! The ERC is the lifeline of the leading labs in Europe, so many research programs will be terminated (just no other sources to compensate). The letter from the ERC says “the only way is to reduce applications” (highlighted in the picture below) No!!! It's the wrong direction. Use AI to assist review. It’s not perfect (yet), but it allows more proposals to be evaluated, and it could support, not replace, human reviewers.
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Lars G. Hemkens retweeted
The Paradox of Knowledge: Why Medical Students Know More But Understand Less pmc.ncbi.nlm.nih.gov/article…
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Fully funded PhD scholarships now open with Bond University’s Institute for Evidence-Based Healthcare. Work on real-world health challenges like Long COVID and Antibiotic Resistance, with expert supervision and full support. Share with your networks: bond.edu.au/jobs/10489/expre…
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