premysl velek 🇪🇺🇨🇿🇳🇱🇪🇸

epidemiology, public health, biostatistics | PhD candidate at @erasmusmcint | LEGACY ACCOUNT

[Ken Rothman @ken_rothman]

Just published: the third edition of Epidemiology, An Introduction, with stellar co-authors Krista Huybrechts and Ellie Murray:

[Solomon Kurz @SolomonKurz]

Check out this response thread wherein Althouse clarifies the difference between the placebo effect and regression to the mean:

[Prof. Christina Pagel - @chrischirp.bsky.social @chrischirp]

🧵War causes direct civilian deaths but also indirect deaths over the following years.

Recent paper estimates eventual total direct & indirect deaths in Gaza attributable to the war - 10% of entire pop'n.

I want to explain these estimates and why deaths must be counted. 1/13

[Peter Tennant has moved to Bluesky @PWGTennant]

"Ratios in regression analyses with causal questions" - interesting new paper in @AmJEpi warning about the casual use of ratio variables in regression analyses when interested in causal effects.

#EpiTwitter
https://t.co/qAyqrVA91E

[IIHF @IIHFHockey]

🇨🇿GOLD IS STAYING IN CZECHIA!🏆🥇
#MensWorlds
@czehockey

[Amaia Calderón-Larrañaga @AmaiaCalderon]

🚨check our scoping review on effectiveness of integrated person-centered interventions for older people in Sweden by brilliant @mariamkirva💫

https://t.co/FcfKOO9HbB

@karolinskainst @anne_bostrom @AnnLiljas @MeganDoheny9 @AnneIFICScot @ProfBrendan @DLVetrano and many others
1/

[David Smith @revodavid]

Today is the 6th anniversary of the R language.

R 1.0.0 was released on February 29, 2000. R 4.3.3 was released today.

Happy anniversary, #Rstats!

[Kareem Carr, Ph.D. @kareem_carr]

“Math ability is mostly genetic. Either you have it or you don’t”

Math education is so bad that there’s no way to know if this is true based on observing the current status quo. Has anyone ever explained to you how to read math books? If you’re like most people the answer is no.

[Dr Ellie Murray, ScD @EpiEllie]

I am a methodologist. Methods is a speciality. We make recipes for others to use.

When I publish methods, I include relevant code, equations, assumptions, & interpretations. I *intend* for people to re-use these.

Citation is expected. Quotation marks would be ridiculous.

[Andrew Stroehlein @astroehlein]

Horrific. My heart goes out to the victims and their families.

Gunman opens fire in a Prague university, killing 14 people in Czech Republic’s worst mass shooting https://t.co/FGAR0nJ2Q8

[Journal of Multimorbidity and Comorbidity @JMultimorbidity]

Call for papers! We are now accepting papers for a Special Collection on Treatment Burden and Multimorbidity with guest editors Dr. @krboehmer and Dr. @GallacherKatieand and Coordinating Editor Dr. @FrancesMair. 1/4

[Judea Pearl @yudapearl]

I would like to supplement @kareem_carr introduction with a note on the analogy between Causal Inference (CI) and algebra.
1. CI is a mathematical method that takes us from what we know (assumptions) to what we wish to know (conclusions, or an answer to a query). It resembles algebra, more than statistics.

2. In algebra, a typical problem goes like that: My brother is 5 years younger than my sister. Last year my sister was twice older than my brother. How old is my brother? Formalizing what we know: X = Y - 5, Y- 1 = 2(X-1),  gives us, after some manipulations, what we wish to know: X=6, Y=11

3. In causal inference, we may face a situation in which we know that:(1) Y cannot cause X, (2) no variable is a cause of both X and Y, (3) DATA: P(x,y). What we wish to know is  Q: the causal effect of X on Y.

4. Trouble: we have no language of formalizing (1) (2) or Q. [We have statistics to give us (3)]

5. CI provides us such language.
(1),(2):  X--->Y, (3) P(x,y); Q = E(Y|do(X=x)] = ?

6. CI gives us both, a language to represent what we know and what we wish to know and a mathematical method of going from the former to the latter.

7. BTW, In our example, the answer is: E(Y|do(X=x)] = E(Y|X=x), as explained by Kareem.

[British/Czech/Slovak @B_C_S_A]

Fifty-five years ago, on the night of August 20-21, 1968, the Warsaw Pact invasion of Czechoslovakia began, marking a definitive end to the hopes that the series of liberalising and democratic reforms, known as the Prague Spring, had brought with it.
https://t.co/I3WwmPNfNa

[premysl velek 🇪🇺🇨🇿🇳🇱🇪🇸 @frenkxs]

French liked Kundera for the wrong reasons, and some Czechs disliked him for the wrong reasons, too. @MurielBlaivePhD on Milan Kundera https://t.co/0HyADh1ErS

[premysl velek 🇪🇺🇨🇿🇳🇱🇪🇸 @frenkxs]

My colleague Marije Splinter is presenting our ongoing joint project on validating and comparing #multimorbidity indices for predicting mortality #weon2023

[Steve McCormick @Quasilocal]

Math is not special.

Like any skill, everyone can learn it if they put in the effort. Like playing basketball, guitar, or anything else that takes practice. Math is not special.

If you struggle with it, take comfort in the fact that everyone struggles with it. 🧵

[Alfredo Morabia @AlfredoMorabia]

THE PUBLIC HEALTH APPROACH
Excited to report that my coming book about the evolution of the public health approach has a website

https://t.co/y0gRl6bJ1y

Check the reviews by
#AlSommer
@DrRichBesser
@LauraMagVall
@JeromeAdamsMD
@mfraserdc1

@AMJPublicHealth @AJPHThinkTank

[premysl velek 🇪🇺🇨🇿🇳🇱🇪🇸 @frenkxs]

Many thanks to all co-authors for their support!
@JosRunhaar, @edeschepper, @Silvanlicher, @karinmgnssn, @dr_englund, @1alid, @Andre_Dellisola, @dschiphof, Erwin van Spil & Sita Bierma-Zeinstra #FOREUM, @erasmusmcintl @erasmusmcintl

[premysl velek 🇪🇺🇨🇿🇳🇱🇪🇸 @frenkxs]

How did COVID-19 impact primary care for musculoskeletal complaints? During March-May 2020 we found 50% drop in GP consultations for any musculoskeletal complaints and 90% drop in number of new diagnoses of osteoarthritis! More in our paper https://t.co/1FFFUViJ9V
@OACJournal

[Trisha Elliott @Trisha_the_doc]

“Multimorbidity deserves its makeover”.

An excellent opinion piece from ⁦@tessajlrichards⁩ in the ⁦@bmj_latest⁩ recently.

Where are the advocates, lobbying for better care? The fund raisers and the champions? The slick slogans?
https://t.co/kHEm8RR4Qb