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Mariska Leeflang

@mariskaleeflang.bsky.social
2.7K followers 476 following 139 posts

Professor in Clinical epidemiology, with a focus on medical tests and diagnostic test accuracy #SystematicReviews. Interested in #reproducibility of science. osiris4r.eu #AcademicSky #EpiSky

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Reposted by Mariska Leeflang
ReproducibiliTea @reproducibilitea.org · 28/09/2026
☕️Shape the future of Open Research: Join the ReproducibiliTea Steering Committee for 2027! We are thrilled to announce that applications are officially open to join the ReproducibiliTea Steering Committee starting in early 2027.
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Paul Hünermund @p-hunermund.com · 16/06/2026
🧵1/4 📢 Call for submissions: Causal Data Science Meeting 2026 Join researchers and practitioners from academia and industry for a virtual meeting on Nov 4–5, 2026, exploring the role of causality in machine learning and AI. #CDSM2026
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Mariska Leeflang @mariskaleeflang.bsky.social · 24/09/2026
lnkd.in/p/ezfz4sQs
lnkd.in
New publication from the Biomarker and Test Evaluation (BiTE) research group! 👀 It appears that the majority (71%!) of studies comparing diagnostic tests have at least 1 flaw in the statistical… | B...
New publication from the Biomarker and Test Evaluation (BiTE) research group! 👀 It appears that the majority (71%!) of studies comparing diagnostic tests have at least 1 flaw in the statistical anal...
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Reposted by Mariska Leeflang
Ingrid Robeyns @ingridrobeyns.bsky.social · 20/09/2026
Ik probeerde het punt te maken dat ik als ideaal een bovengrens aan te ontvangen erfenissen en giften verdedig, maar dat we goed moeten opletten op wat er op dit moment gebeurt, en dat is een georkestreerde lobby die stap voor stap werkt richting afschaffing van erf- en schenkbelasting.
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Judith Sargentini @judithsargentini.bsky.social · 17/09/2026
Zo hé, Jan Pronk spreekt niet met meel in de mond: ‘sociaal-democraten verloochenen links gedachtegoed. Groenen tonen zich volwaardig erfgenaam van de sociaal-democratie, een beweging die aansluit bij de jeugd’. www.trouw.nl/opinie/jan-p...
trouw.nl
Jan Pronk en Boyd Angenent: Pas op, de sociaaldemocratie in Europa staat voor oude politiek
Pro hoort in Europa bij de Groenen en niet bij de sociaaldemocraten. Die hebben wel meer macht, maar gebruiken die verkeerd, menen voormalig PvdA-politicus Jan Pronk en Boyd Angenent, oud-voorzitter v...
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Stephen Heard @stephenbheard.bsky.social · 15/09/2026
On LLMs, and why I choose not to use them in writing my books. In part I'm explaining this to myself, because the more you think about it, the less obvious it gets. scientistseessquirre... 1/3
scientistseessquirrel.wordpress.com
Why I don’t use LLMs in writing my books
There’s quite the hullabaloo, these days, around the use of so-called “AI” writing tools (more precisely “large language models” – ChatGPT and its kin) in writing. And I write a lot, including writ…
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Peter Tennant @pwgtennant.bsky.social · 16/09/2026
"Why epidemiology should not be automated: the case for slow epidemiology" Read my new letter with @haidonglu.bsky.social and @epidbydesign.bsky.social in @intjepidemiol.bsky.social explaining the limits of generative AI for epidemiological research! academic.oup.com/ije/article/...
"Bann et al. pose the question, ‘why can’t epidemiology be automated (yet)?’, as though the automation of epidemiology is both inevitable and desirable [1]. They describe a future of ‘1-click reviews’ and ‘end-to-end automation’ that will ‘[boost] the efficiency of current practice and … [create] new opportunities for’. But scientific discovery requires far more than increased efficiency. In epidemiology, new knowledge comes from critical reasoning about data, about context, and about the limits of our existing understanding. Such reasoning, in turn, demands deep thought, scholarship, and diligence. All are threatened by automation..."
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Madhu Pai, MD, PhD @madhupai.bsky.social · 13/09/2026
I updated this list of over 110 inspiring films in global health! communities.springernature.com/posts/inspir...
communities.springernature.com
Inspiring Global Health Films
This is a crowd-sourced list of over 110 inspiring, must-watch movies focused on global health topics
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Madhu Pai, MD, PhD @madhupai.bsky.social · 03/09/2026
As the number of observational studies continues to grow and with big data and AI use exploding, epidemiologists need better tools and best practices to produce reliable evidence and maintain public trust in science @natureportfolio.nature.com @gidmk.bsky.social www.nature.com/articles/s44...
nature.com
Seven ways to improve observational epidemiology and build trust - Nature Health
As the number of observational studies continues to grow and with big data and AI use exploding, epidemiologists need better tools and best practices to produce reliable evidence and maintain public t...
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Reposted by Mariska Leeflang
Paul van de Vijver @paulvdvijver.bsky.social · 21/08/2026
#IJssel | 12 Beleefplekken rondom hoogwaterbescherming: onzeijssel.nl/initiatieven... 💧Met fiets-, wandel-, struin- en pontjesroutes door o.a. Klimaatpark de IJsselpoort, langs vispassages, hoogwatergeul en dijkversterking
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White Rose Resistance @whiteroseresistance.org · 14/08/2026
"If you aren't building your own bank robbing robot, you're going to be left behind in the new economy."
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Alfred Nobel @alfrednobel.bsky.social · 02/08/2026
Asking the right questions is the major challenge in science! No AI will ever (and I repeat ever) be capable to ask those questions (unless you ask them 🤣). (Btw, Elon, no car will ever be capable to drive autonomously like humans do.)
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Dan Quintana @dsquintana.bsky.social · 06/07/2026
Our department just announced a new Associate Professor position in quantitative research methodology 🇳🇴 One of the favorable qualifications is experience with open science practices + R/Python experience www.jobbnorge.no/en/available...
jobbnorge.no
Associate Professor in Quantitative Research Methodology (302697) | University of Oslo
Job title: Associate Professor in Quantitative Research Methodology (302697), Employer: University of Oslo, Deadline: Tuesday, September 1, 2026
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tenuretracker.info @tenuretracker.bsky.social · 07/07/2026
The University of Auckland is hiring: Lecturer to Senior Lecturer to Associate Professor - Department of Statistics #lecturer #professor #statistics
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Madhu Pai, MD, PhD @madhupai.bsky.social · 23/06/2026
Target Product Profile for a Point-of-Care Blood Lead Level Screening Test Open for public comment forms.office.com/Pages/Respon...
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Mariska Leeflang @mariskaleeflang.bsky.social · 21/06/2026
De 14-jarige is weer bezig met zijn 3D pen. Dit keer een orchidee-bidsprinkhaan.
Orchid-mantis, made from white and pink plastic filament
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Julia M. Rohrer @dingdingpeng.the100.ci · 20/05/2026
Just started listening to “Everything is Tuberculosis” (which is great so far) and TIL the three 19yo assassins of Franz Ferdinand all suffered from tuberculosis and while they couldn’t be legally executed due to their age, they all eventually died of the disease before the war ended.
Cover of the audiobook version of “Everything is Tuberculosis” by John Green
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Retraction Watch @retractionwatch.com · 18/05/2026
Scrolling through an online image dataset, Adrian Barnett pointed out a few familiar faces: Sylvester Stallone, George Clooney, Angelina Jolie and Daniel Craig. “You can see,” Barnett said, “this is just a comically bad dataset.” retractionwatch.com/2026/05/18/k...
retractionwatch.com
‘Comically bad’ datasets used to train clinical models for stroke and diabetes
A dataset on Kaggle purportedly showing people who have had a stroke includes images of Sylvester Stallone from Rambo and other celebrities. Source Scrolling through an online image dataset, Adrian…
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Mieke van Stigt @miekevanstigt.bsky.social · 20/05/2026
Mijn column: over waarom de term 'hardwerkende Nederlander ' zo problematisch is. www.socialevraagstukken.nl/column/over-...
socialevraagstukken.nl
Over hardwerkende Nederlanders en de taal van uitsluiting
De hardwerkende Nederlander: ook buiten verkiezingstijd lijkt het om deze soort te draaien. Hard werken moet lonend zijn, aldus de politiek. Dat klinkt best betrokken, maar het is op vele manieren pro...
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Mariska Leeflang @mariskaleeflang.bsky.social · 14/05/2026
Andes #hantavirus outbreak on a cruise ship - an ESCMID Emerging Infections Subcommittee (EIS) rapid assessment - Clinical Microbiology and Infection www.clinicalmicrobiologyandinfection.org/article/S119...
clinicalmicrobiologyandinfection.org
Andes hantavirus outbreak on a cruise ship - an ESCMID Emerging Infections Subcommittee (EIS) rapid assessment
The ongoing cluster of hantavirus infections associated with the cruise ship MV Hondius represents an unusual but instructive event at the intersection of zoonotic spillover, human mobility, confined ...
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Elisabeth Bik @elisabethbik.bsky.social · 06/05/2026
After lunch, Inge Stegeman, with "Open Science to Increase Reproducibility in Science: The OSIRIS Project" - osiris4r.eu Is Open Science going to solve all our problems with reproducibility? Are there benefits or harms? Let's study this! We got funding and a good group from all over Europe #WCRI2026
Speaker on the left, her title slide on the right
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Jeroen Steeman @jeroensteeman.bsky.social · 03/05/2026
Zo'n video als @zackpolanski.bsky.social maakte, maar dan van @progressiefned.bsky.social zou op dit moment echt een verschil kunnen maken in het volledig verrotte migratiedebat in Nederland. (En zou mij een beetje meer vertrouwen geven in dit nieuwe partij-project.)
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Overly.Honest.Editor @editoratlarge.bsky.social · 23/04/2026
Ultimately though, if you always have to wonder about what the next excuse might be, then it very clearly means it's the wrong tool for the job. What is a surprise, is that we need to keep saying that last part out loud #ScientificPublishing 2/2
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Jonathan Ryder, MD @jonathanrydermd.bsky.social · 18/03/2026
New target trial emulation study in @cmijournal.bsky.social comparing monotherapy (mostly amp) to combo (mostly amp with CRO or gent) for Enterococcus faecalis BSI (not endocarditis). Composite outcome similar between mono & combo #IDSky www.clinicalmicrobiologyandinfection.org/article/S119...
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Clinical Microbiology and Infection @cmijournal.bsky.social · 11/04/2026
May 2026 Issue is now online: www.clinicalmicrobiologyandinfection.org/issue/S1198-...
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Mariska Leeflang @mariskaleeflang.bsky.social · 17/04/2026
Every disadvantage has its advantage
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Ecraid @ecraid.bsky.social · 03/04/2026
Join the Young Investigator Workshop at #ESCMIDGlobal 2026 for practical insights and science you can actually use! Early-career investigators are driven to deliver meaningful research, but navigating the “how” isn’t always straightforward. 📍 Room 2 (ICM Ground Floor) 👉 bit.ly/4uKdN0r
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Hesters rariteitenkabinet @hetwonderkabinet.nl · 25/03/2026
Keihard gewerkt vandaag maar m’n winkel ziet er weer pico bello (vind ik en ik ben de baas) uit voor het begin van het seizoen volgende week.
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Florian Naudet @floriannaudet.bsky.social · 19/03/2026
SPIN GRAND CHELEM 🏆 Psilocybin JAMA Psychiatry trial 🍄 a) Positive framing despite negative primary outcome, b) Inconclusive results presented as supportive evidence, c) Safety concerns downplayed with reassuring wording. See the rest of the 🧵 for the verbatim...
jamanetwork.com
Psilocybin in Treatment-Resistant Major Depression
This randomized clinical trial investigates the efficacy and safety of psilocybin, 25 mg, with adjunct psychotherapy in treatment-resistance major depression.
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Prof Andy Field @profandyfield.com · 18/03/2026
I’m considering whether I could set this up as required reading for students to gain access to my module canvas sites. Such a great summary of important issues.
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Darren Dahly @statsepi.bsky.social · 18/03/2026
Every day is a good day for sharing one of the most useful papers about research data ever written. PLEASE get your people to understand and follow this advice. www.tandfonline.com/doi/full/10....
Data Organization in Spreadsheets
Karl W. Broman
& Kara H. Woo
Pages 2-10 | Received 01 Jun 2017, Accepted author version posted online: 29 Sep 2017, Published online: 24 Apr 2018

    1. Introduction
    2. Be Consistent
    3. Choose Good Names for Things
    4. Write Dates as YYYY-MM-DD
    5. No Empty Cells
    6. Put Just One Thing in a Cell
    7. Make it a Rectangle
    8. Create a Data Dictionary
    9. No Calculations in the Raw Data Files
    10. Do Not Use Font Color or Highlighting as Data
    11. Make Backups
    12. Use Data Validation to Avoid Errors
    13. Save the Data in Plain Text Files

ABSTRACT

Spreadsheets are widely used software tools for data entry, storage, analysis, and visualization. Focusing on the data entry and storage aspects, this article offers practical recommendations for organizing spreadsheet data to reduce errors and ease later analyses. The basic principles are: be consistent, write dates like YYYY-MM-DD, do not leave any cells empty, put just one thing in a cell, organize the data as a single rectangle (with subjects as rows and variables as columns, and with a single header row), create a data dictionary, do not include calculations in the raw data files, do not use font color or highlighting as data, choose good names for things, make backups, use data validation to avoid data entry errors, and save the data in plain text files.
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Hesters rariteitenkabinet @hetwonderkabinet.nl · 17/03/2026
Gisteren in Canva zelf een poster/flyer etc gemaakt (en gelijk besteld). Ik ben er best wel trots op en hoop dat het ook gaat werken. Zo tof dat je dit soort dingen gewoon zelf kan doen (dit was geen bestaand template).
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Science Integrity Alliance @sci-integrity.com · 14/03/2026
The January-March 2026 issue of REACH is now live! 🎉 📘Inside: CRediT, the Einstein Foundation Award, Cochrane's 30th anniversary, Jennifer Byrne on paper mills, our SIA Special Report on AI Stress Points in Scholarly Publishing (Part I), and much more! 👉🏻 www.sci-integrity.com/reach-januar...
sci-integrity.com
REACH January-March 2026 | Science Integrity Alliance
REACH is a modern, interactive, and comprehensive digital magazine designed to meet the shared needs of all stakeholders in the research community.
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Jason Koebler @jasonkoebler.bsky.social · 12/03/2026
I met with AI data labelers in Kenya who are organizing their colleagues to fight the brutal working conditions and horrible pay given to the workers at the "bottom of the AI supply chain." They believe the NDAs they've signed are unenforceable so are speaking out: www.404media.co/ai-is-africa...
404media.co
'AI Is African Intelligence': The Workers Who Train AI Are Fighting Back
Kenyan workers are still the underpaid labor behind AI training, moderation, and sex chatbots. The Data Labelers Association is fighting back.
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David De Pue @dpdaaf.bsky.social · 11/03/2026
Wat is het verband tussen de plant Bitterzoet (𝘚𝘰𝘭𝘢𝘯𝘶𝘮 𝘥𝘶𝘭𝘤𝘢𝘮𝘢𝘳𝘢), de uitbouw van fietsinfrastructuur langs Kempische waterlopen, en ringrot op aardappelen? Kom het te weten in de zesde aflevering van Planeet Plant! planeetplant.buzzsprout.com/2546032/epis...
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Framework for Open and Reproducible Research Training @forrt.bsky.social · 09/03/2026
Let us know if you use the #AcademicWheelOfPrivilege in your authorship teams or in other academic contexts! You can also follow along for updates on the Academic Wheel of Privilege on FORRT’s: Website: forrt.org/awop/ Slack Channel: forrt.slack.com/archives/C03...
forrt.org
Academic Wheel of Privilege (AWoP)
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De Groene Amsterdammer @groene.nl · 04/03/2026
Wie online een zwangerschapstest koopt, loopt de kans dat Amerikaanse techbedrijven weet krijgen van je kinderwens. Met geitenpaadjes verzamelen de drogisten gevoelige informatie over je gezondheid, om die vervolgens door te sturen aan Google of Meta. 👉 buff.ly/i7nQpEQ
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Ben Goldacre @bengoldacre.bsky.social · 23/02/2026
OpenSAFELY is open from today! Huge thanks to all who supported this vast collaboration: whole population GP data; in a productive platform; innovative privacy protections; unprecedented support from professions, privacy campaigners; &c Now it's over to users! www.bennett.ox.ac.uk/blog/2026/02...
bennett.ox.ac.uk
OpenSAFELY news: you can apply to do non-COVID research, from today! | Bennett Institute for Applied Data Science
We are delighted to announce that - from today - you can submit applications to the OpenSAFELY service for non-COVID-19 studies.
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Maria Cuellar @mcuellar.bsky.social · 19/02/2026
Hi bluesky! I was wondering whether you know of any papers that discuss how much easier it is to do a replication study with agentic AI (eg Codex/Claude Code). In the absence of code, it seems like that's a great way to test whether the models reported in a paper were the ones that were fit, etc.
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Mariska Leeflang @mariskaleeflang.bsky.social · 17/02/2026
Yay! QUADAS-3 is out! 🔬🧪 Are you planning to do a systematic review of diagnostic test accuracy? Then check out today's Annals of Internal Medicine for QUADAS-3 and its E&E document! Changes to QUADAS-2 domains and focus on “ideal test accuracy trial”. #DiagnosticResearch #EvidenceBasedMedicine
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MetaROR @metaror.bsky.social · 11/02/2026
For the University of Helsinki's comprehensive research assessment, researchers designed a dedicated module to capture interdisciplinarity. Reviewers called their approach "inspiring" and did not identify major weaknesses, but do provide recommendations. 👇 Read the assessment, reviews & full text
metaror.org
Exploring interdisciplinarity – raising self-awareness through a comprehensive research assessment - MetaROR
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Hetan Shah @hetanshah.bsky.social · 04/02/2026
Striking paper from researchers at Anthropic using a randomised control trial to look at the effects of AI use on skills acquisition. TL:DR ‘We found that using AI assistance led to a statistically significant decrease in mastery.’ www.anthropic.com/research/AI-...
anthropic.com
How AI assistance impacts the formation of coding skills
Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
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Margot Finn @eicathomefinn.bsky.social · 03/02/2026
'to treat peer review as a throughput problem is to misunderstand what is at stake. Review is not simply a production stage in the research pipeline; it is one of the few remaining spaces where the scientific community talks to itself.' 1/3
timeshighereducation.com
AI is not a peer, so it can’t do peer review
If we still believe that science is a vocation grounded in argument, curiosity and care, we can’t delegate judgement to machines, says Akhil Bhardwaj
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Lukas Röseler @aufdroeseler.bsky.social · 02/02/2026
The FORRT Replication Database has received a massive overhaul (FReD 2.0): We double-coded and validated all data from scratch and extended it in the course of a one-year-partnership with the @cos.io. We just switched to a faster interface thanks to @lukaswallrich.bsky.social’s wizardry.
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Community for Rigor @comm4rigor.bsky.social · 02/02/2026
Reproducibility and open science are great, but they don't necessarily equate to rigor. You can perfectly share a study and still draw weak conclusions. True rigor lives in the questions we ask, the designs we choose, and the inferences we make.
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Madhu Pai, MD, PhD @madhupai.bsky.social · 01/02/2026
During the peak of the Covid-19 pandemic, I taught three, online courses for journalists on basics of epidemiology Course recordings and slides are still available as a free resource on my teaching website www.teachepi.org/courses/epid...
Poster for an online course on epidemiology for journalists
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Lex Bouter @lexbouter.bsky.social · 29/01/2026
Recommended reading for all who care about universities and their role in society. Yesterday Iris Lechner defended her PhD thesis on the epistemic responsibilities of universities in a sparkling discussion with her opponents. PhD thesis is available at: bit.ly/45EDkNz @wcrifoundation.bsky.social
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Dees @caseofdees.eurosky.social · 25/01/2026
Ik zei het toch? Topvrouw zorg Ann van den Bruel (KCE België) kritisch over screenings: ‘Je spoort ook kankers op die je beter niet had gevonden’ en 'We kijken nu veel te naïef naar screenings.’ archive.ph/DFVWX
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Mariska Leeflang @mariskaleeflang.bsky.social · 20/01/2026
Lekker hoor: om 5 uur 's ochtends ontbijt op bed!
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Eric Shuman @ericmshuman.bsky.social · 19/01/2026
I am looking to recruit a postdoc to join my lab next fall, & work on projects focused on online mobilization with social media datasets - see more details here: bit.ly/4r49x9b . If anyone knows of someone with relevant skills who is looking for a postdoc- please pass this on!
bit.ly
Research Associate in Psychology
Dr. Eric Shuman at the University of Virginia invites applications for a post-doctoral research associate with expertise in the social psychology of social protest, social change, and/or in big data, ...
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