Zimbo Boudewijns
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zimboboudewijns.bsky.social
Zimbo Boudewijns
@zimboboudewijns.bsky.social
65 followers 340 following 0 posts
Data Steward at Utrecht University
Posts Replies Media Videos
Reposted by Zimbo Boudewijns
cellpress.bsky.social
The link between the gut #microbiome and autism is not backed by science, researchers say.

Read the full opinion piece in @cp-neuron.bsky.social: spkl.io/63322AbxpA

@wiringthebrain.bsky.social, @statsepi.bsky.social, & @deevybee.bsky.social
First page of Opinion piece: "Conceptual and methodological flaws undermine claims of a link between the gut microbiome and autism"
November 13, 2025 at 4:00 PM
Reposted by Zimbo Boudewijns
opencausal.org
opencausal.org is online!

Open Causal is an open platform to share, discuss and reuse causal graphs. Join now as a beta user, help shaping the future of causal graphs!
Open Causal (Beta)
opencausal.org
November 13, 2025 at 6:59 AM
Reposted by Zimbo Boudewijns
frantecol.bsky.social
Vandaag staat mijn visie als hypothetische minister van Landbouw, Natuur, en Stikstof in dit prachtige artikel in @volkskrant.nl
Dat stuk is natuurlijk erg kort en simpel, daarom hier een 🧵 van mijn hoofdpunten met wat meer onderbouwing!
www.volkskrant.nl/kijkverder/v...
Analyse Wonen, stikstof, migratie: deze wetenschappers weten wél hoe je dat oplost
Hoe zouden wetenschappelijke experts omgaan met de vele uitdagingen waarvoor Nederland staat? De uitkomsten zijn opvallend eenduidig – en hoopgevend.
www.volkskrant.nl
September 27, 2025 at 4:56 PM
Reposted by Zimbo Boudewijns
femkehalsema.bsky.social
Gisteren was ik bij de prachtige en actuele Herzberglezing van @sheilas.bsky.social. Neem er even de tijd voor …

www.trouw.nl/verdieping/m...
Mag je de democratie verdedigen met niet-democratische middelen, en zo ja, waar vecht je dan nog voor?
Abel Herzberg heeft indringend geschreven over de rollen die mensen aannemen onder de extreemste omstandigheden. Van toen naar nu is een grote sprong in de tijd, en tegelijk helemaal niet zo groot.
www.trouw.nl
September 22, 2025 at 7:21 AM
Reposted by Zimbo Boudewijns
michelnivard.bsky.social
Apply to do a PhD with me, Laura Corbin, Gareth Hawkes and George Davey Smith ( @mendelrandom.bsky.social) in Bristol on identifying rare effects on health using new and innovative methods. Amazing team, great educational environment, lovely city. Forward to your undergrads wrapping up!
Shining a light on the un-common to identify novel health risk-factors - GW4 BioMed MRC DTP
Project Code MRCPHS26Br Nivard Project Type Dry lab Research Theme Population Health Science Project Summary Download Summary Complex traits such as body mass index and height are influenced by a mixt...
gw4biomed.ac.uk
September 19, 2025 at 7:46 AM
Reposted by Zimbo Boudewijns
numenini.bsky.social
Great piece today by Simon Barnes, one of last to see a Slender-billed Curlew observer.co.uk/news/science... following research confirming extinction @rspb.bsky.social @rspbscience.bsky.social @birdlifeglobal.bsky.social @naturalis.bsky.social @nhm-london.bsky.social @ucllifesciences.bsky.social
Why we should all mourn the slender-billed curlew
A bird that hasn’t been photographed since 1995 has now been declared extinct. Its fate is cause for wider alarm
observer.co.uk
September 7, 2025 at 8:47 AM
Reposted by Zimbo Boudewijns
eikofried.bsky.social
Finished WARN-D data collection, all cohorts/waves. Cleaning & deidentifying data now so we can share w research community.

First look at compliance rates: left 3mo EMA data, right baseline + follow-ups. Super happy with this.

Thx to @rayyantutunji.bsky.social for quick graphs.
3 months EMA data (4 timer per day), in 4 cohorts of students in the Netherlands that started November 2021 and then half a year later each. 24 months of data, baseline + follow ups every 3 months, in 4 cohorts of students in the Netherlands that started November 2021 and then half a year later each.
September 5, 2025 at 12:00 PM
Reposted by Zimbo Boudewijns
cghlewis.bsky.social
I've been talking about basic DM practices like better documentation, good record keeping, spending time planning, and standardizing practices for a long time (and others talked about it long before me).

But these things still aren't happening in many projects. So I'll keep getting the word out. 😊📣
August 20, 2025 at 2:20 PM
Reposted by Zimbo Boudewijns
eikofried.bsky.social
We have 3 months open text data for N=2000 in which we ask 4/day what they are doing & some other questions (eg worst/best events of day).

Want to de-identify data before sharing.

1. How?
2. Anyone interested in collaborating? Surveys in Dutch/English, perhaps interesting paper for someone?
August 18, 2025 at 1:59 PM
Reposted by Zimbo Boudewijns
eikofried.bsky.social
New paper by @bsiepe.bsky.social & WARN-D team out now in JoPACS, on the (lack of) relation between EMA selfreport and Garmin passive data.

Guardian @theguardian.com coverage:
www.theguardian.com/technology/2...

Paper:
psycnet.apa.org/doiLanding?d...

🧪 #PsychSciSky #StatsSky #EpiSky
Smartwatches offer little insight into stress levels, researchers find
Academic study suggests devices cannot differentiate between someone being overworked and being excited
www.theguardian.com
August 11, 2025 at 10:51 AM
Reposted by Zimbo Boudewijns
birdlifeeurope.bsky.social
⚠️ Yesterday, the European Commission released its long-awaited proposal for the post-2027 Common Agricultural Policy (CAP). With one of the the biggest funds of the EU budget at stake, this policy will shape farming and rural life for years to come.
July 18, 2025 at 10:57 AM
Reposted by Zimbo Boudewijns
laurewynants.bsky.social
Our team quantified how often clinical prediction models are evaluated or used. Spoiler alert: we found more self-reported clinical use in patient care than evidence of thorough evaluation.

www.jclinepi.com/article/S089...
External validation, impact assessment and clinical utilization of clinical prediction models: a prospective cohort study
We aimed to assess paths taken by clinical prediction models (CPM) after development by quantifying external validation, impact assessment, and utilization in clinical practice.
www.jclinepi.com
July 18, 2025 at 8:19 AM
Reposted by Zimbo Boudewijns
ymor.bsky.social
ADHD is geen trend. Het is een functiebeperking. Mogelijk is het op dit moment ook onze enige taal om mentale onrust te verklaren en te behandelen. In een beter functionerend zorgsysteem kan je met mensen uitzoeken wat er aan de hand is, bijv. door te onderzoeken of er trauma speelt.
July 14, 2025 at 4:59 PM
Reposted by Zimbo Boudewijns
niooknaw.bsky.social
Vacature: Als datamanager ben je verantwoordelijk voor het beheer van ringgegevens en aflezingen van vogels met kleurmerktekens op cr-birding.org.
Solliciteer via onze website: nioo.knaw.nl/nl/vacatures...
Twee aluminium vogelringen met inscriptie Vogeltrekstation
June 27, 2025 at 2:08 PM
Reposted by Zimbo Boudewijns
judyshamounb.bsky.social
We are hiring a new PhD candidate 🎉as part of the No-REGRETS (NOrth Sea Renewable Energy: Gaining the Required Ecological Knowledge for the TranSition) consortium. If you are excited too, have what we are looking for and interested in joining us please apply. #ornithology #animalmovement
June 18, 2025 at 3:20 PM
Reposted by Zimbo Boudewijns
cghlewis.bsky.social
How did I miss this great blog post (and Bluesky post) from @bharrap.bsky.social? As you might expect, I would have lots to say about variable naming conventions. 😄

My favorite line from the blog post:
What makes a bad naming convention?
#1 Not using a convention 😉

benharrap.com/post/2025-03...
What makes a good variable naming convention – Ben Harrap
benharrap.com
May 23, 2025 at 1:37 AM
Reposted by Zimbo Boudewijns
michelnivard.bsky.social
🔥🔥🔥 2 years of our lives right there (extremely proud of everyone, I’ll write a thread later)
tedmond.bsky.social Ted Schwaba @tedmond.bsky.social · May 20
Extremely excited to share the first effort of the Revived Genomics of Personality Consortium: A highly-powered, comprehensive GWAS of the Big Five personality traits in 1.14 million participants from 46 cohorts. www.biorxiv.org/content/10.1...
May 20, 2025 at 11:53 AM
Reposted by Zimbo Boudewijns
pwgtennant.bsky.social
I'm not sure it's ethical to be conducting associational studies for such socially important exposures as smartphone use in schools.

Either conduct a causal study or don't do anything. Demonstrating the presence or absence of non causal association is not helpful and may end up being misleading.
thementalelf.bsky.social The Mental Elf @thementalelf.bsky.social · May 13
Smartphone bans in schools are not associated with better mental wellbeing or reduced screen-time out of school buff.ly/C8Zo4PQ

#Smartphones #Screentime #PhoneBans #Schools #YouthMentalHealth

🧵 THREAD
May 13, 2025 at 10:37 AM
Reposted by Zimbo Boudewijns
maartenvsmeden.bsky.social
Code or it did not happen
dingdingpeng.the100.ci Julia M. Rohrer @dingdingpeng.the100.ci · May 9
Folks, always share your code. It doesn’t have to be perfect to be helpful. And if you feel that it’s still too messy or not sufficiently clean to be shared, you shouldn’t submit yet. After all, there could be mistakes in your mess.
May 9, 2025 at 2:19 PM
Reposted by Zimbo Boudewijns
dingdingpeng.the100.ci
Folks, always share your code. It doesn’t have to be perfect to be helpful. And if you feel that it’s still too messy or not sufficiently clean to be shared, you shouldn’t submit yet. After all, there could be mistakes in your mess.
May 9, 2025 at 10:21 AM
Reposted by Zimbo Boudewijns
cghlewis.bsky.social
We need more data janitors in the world. 🧹
People whose focus is organizing, documenting, and wrangling data for other people. I would welcome the company. It’s not a glamorous job but it’s really important and it’s very needed.
April 29, 2025 at 10:57 PM
Reposted by Zimbo Boudewijns
maartenvsmeden.bsky.social
HIRING!

We offer 3 fully funded PhD positions to work on research methodology with experts in a great medical research environment.

More info: www.linkedin.com/feed/update/...
HIRING! We offer 3 fully funded PhD positions to work on research… | Maarten van Smeden
HIRING! We offer 3 fully funded PhD positions to work on research methodology with experts in a great medical research environment. Interested in one of these projects? Send us your motivational let...
www.linkedin.com
April 25, 2025 at 6:31 AM
Reposted by Zimbo Boudewijns
statsepi.bsky.social
A simple but vital point, still too often ignored: You can only adjust for what you can measure. If your measurements are imprecise, then your adjustment must obviously suffer.

pmc.ncbi.nlm.nih.gov/articles/PMC... (from @mendelrandom.bsky.social)
learly such "regression dilution bias" is important when considering univariate, unadjusted relative risks. However it can be particularly important when considering the effect of a risk factor on risk ofdisease after adjustment for a confounding factor. If the risk factor and the confounding factor are correlated to any substantial degree then the extent of error in measurement in either the confounding or the risk factor can significantly affect the adjusted relative risk estimate.6 In the case of coffee and myocardial infarction, mentioned above, the relative risk associated with drinking 10 or more cups of coffee per day fell from 4 9 to 2-9 after adjustment for confounding variables in a multiple logistic regression model.4 The single measurements taken of the confounders are a poor proxy for the lifetime experience ofthe subjects, and will also suffer from some degree ofsimple measurement error. Thus their effect on risk will have been underestimated. If the confounding factors could have been better characterised then the relative risk for coffee drinking might have fallen to 1 after adjustment. In other words, it can appear that a risk factor is related to risk of disease after adjustment for confounding factors, but this residual relationship only exists because of underadjustment for these confounding factors
April 23, 2025 at 12:28 PM
Reposted by Zimbo Boudewijns
statsepi.bsky.social
Looking back on the pandemic as scientists, the most important thing we can do is to ask "what evidence could I have helped generate that would have led to better decisions?" and then plan accordingly.

Continuing to "debate" what coulda/shoulda but didn't is much less helpful. Except for clicks.
April 20, 2025 at 11:36 AM
Reposted by Zimbo Boudewijns
kevinh-phd.bsky.social
After 21 years at my dream job, I’m very sad to announce my early retirement from the National Institutes of Health. My life’s work has been to scientifically study how our food environment affects what we eat, and how what we eat affects our physiology.
April 16, 2025 at 9:00 PM