Jakub Ruszkowski's Avatar

Jakub Ruszkowski

@jruszkowski.bsky.social

MD, PhD. Internal medicine specialist, nephrology trainee. Passionate about pathophysiology, immunology, statistics, and evidence synthesis.

358 Followers  |  315 Following  |  76 Posts  |  Joined: 28.11.2024  |  2.3064

Latest posts by jruszkowski.bsky.social on Bluesky

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modelbased: An R package to make the most out of your statistical models through marginal means, marginal effects, and model predictions Makowski et al., (2025). modelbased: An R package to make the most out of your statistical models through marginal means, marginal effects, and model predictions. Journal of Open Source Software, 10(1...

#statstab #390 modelbased: An R package to make the most out of
your statistical models through marginal means,
marginal effects, and model predictions

Thoughts: Great package for getting predicted probabilities for your models.

#rstats #r #easystats

doi.org/10.21105/jos...

18.07.2025 18:21 โ€” ๐Ÿ‘ 10    ๐Ÿ” 4    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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The Double-Icodextrin Dose Randomized Controlled Trial of a Double #Icodextrin Dose for #Older Patients on Incremental Continuous Ambulatory Peritoneal Dialysis #CAPD

#VisualAbstract by @md_abdulqader83

www.kireports.org/ar...

@lobbedezt.bsky.social @clemencebechade.bsky.social

18.07.2025 15:00 โ€” ๐Ÿ‘ 12    ๐Ÿ” 7    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 1
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The "reproducibility crisis" in science constantly makes headlines. Repro efforts are often limited. What if you could assess reproducibility of an entire field?

That's what @brunolemaitre.bsky.social et al. have done. Fly immunity is highly replicable & offers lessons for #metascience

A ๐Ÿงต 1/n

10.07.2025 08:21 โ€” ๐Ÿ‘ 319    ๐Ÿ” 172    ๐Ÿ’ฌ 10    ๐Ÿ“Œ 18
Using robcov() to adjust for donor-level clustering in kidney transplant outcomes? I am doing a study to assess the association between transplant factors and kidney transplant outcomes (specifically survival of the transplanted kidney) using US registry data. Iโ€™m using `cph()`. A key issue is that when looking at outcomes, most recipients are not truly independent as they are clustered by donor. Specifically, in our analysis we have 57,153 donors where both kidneys were transplanted (into different recipients) and 39,389 donors where only one kidney was transplanted into a single recipient. So our analysis on recipient outcomes has n=153,695 recipients, and 96,542 donor clusters (each of which has either 1 or 2 recipients). The focus of the research study is to assess if how the kidney was preserved impacts on kidney graft survival, and I adjust for several donor and recipient factors in the model. This is how I am currently using robcov to get cluster robust SE (from which I am calculating 95% confidence intervals) fit <- cph(Surv(time, event) ~ var1 + var2 + var3, data, x = TRUE, y = TRUE) fit_robust <- robcov(fit, cluster = data$donor_id) My understanding is that this uses the Huber-White method for updating the variance-covariance, which will increase the variance due to the clustering. Iโ€™ve seen other papers in the field use frailty terms (or other mixed effect models for non-survival outcomes). However, I think that robust SE using `robcov()` is probably a better solution here. Is this a valid approach, given the large number of clusters, but small cluster size (either 2 or 1 per cluster)? Would the same approach be valid for logistic regression and linear (fit with `ols()`)?
06.07.2025 07:27 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

[Skim] KI-Tools fรผr die wissenschaftliche Literaturrecherche: Potenziale, Problematiken, Didaktik und Zukunftsperspektiven www.degruyterbrill.com/document/doi... - or AI Tools for Academic Literature Search: Possibilities, Problems, Didactics, and Future Prospects insanely comprehensive! (1)

06.07.2025 09:30 โ€” ๐Ÿ‘ 6    ๐Ÿ” 5    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Next level of cherry-picking. Lack of significance in Student's t-test? Report then F-test and interpret it as a t-test ๐Ÿซฃ๐Ÿซฃ๐Ÿซฃ

(F-test compares variances, not means๐Ÿคก)

Source: doi.org/10.3390/cell...

01.07.2025 18:29 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Proportional Odds Model Power Calculations for Ordinal and Mixed Ordinal/Continuous Outcomes โ€“ Statistical Thinking This article has detailed examples with complete R code for computing frequentist power for ordinal, continuous, and mixed ordinal/continuous outcomes in two-group comparisons with equal sample sizes....

#Statistics thought of the day: Need power calculations for a 2-group comparison on an ordinal or continuous response variable Y with/without clumping at a specific value (e.g., 0) of Y, with a possibly bimodal, heavy tailed, or skewed distribution? See www.fharrell.com/post/pop/ #RStats #StatsSky

23.06.2025 14:30 โ€” ๐Ÿ‘ 8    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Validate User

CLINICAL IMPACT:
Current CKD staging doesn't account for proximal tubular damage - a key risk factor for hypomagnesemia in CKD patients. ๐Ÿ’Š Mg supplementation showed limited efficacy in proteinuric patients

Read more: doi.org/10.1093/ndt/...
๐Ÿงต3/3

21.06.2025 08:13 โ€” ๐Ÿ‘ 3    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

KEY FINDINGS:
๐Ÿ” Proteinuria = higher probability of hypo-Mg (OR 2.2; 95% CI 1.2โ€“4.0), especially in non-diabetics
๐Ÿ“ˆ Higher proteinuria (uPCR) โ†’ higher urinary Mg excretion (FE-Mg)
๐Ÿงช When proximal tubular markers were included in analysis, the uPCR-FEMg association weakened significantly

๐Ÿงต2/3

21.06.2025 08:13 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Validate User

HYPOMAGNESEMIA IN CKD - Renal Magnesium Wasting

While CKD typically causes hypermagnesemia due to โ†“GFR, researchers from Osaka University found that ~15% of CKD patients paradoxically develop hypomagnesemia instead.
academic.oup.com/ndt/article/...
๐Ÿงต1/3

#NephSky #Nephrology

21.06.2025 08:13 โ€” ๐Ÿ‘ 6    ๐Ÿ” 1    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0
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Fecal microbiota transplantation from patients into animals to establish human microbiota-associated animal models: a scoping review Journal of Translational Medicine

A Review published in the Journal of Translational Medicine gives an overview of the current state of research using human-to-animal fecal microbiota transplantation to elucidate the role of the gut microbiota in the pathophysiology of noninfectious diseases and traits.

#MedSky

20.06.2025 14:30 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Thanks for sharing! โ˜บ๏ธ I have to admit, my enthusiasm faded when I kept discoveringโ€”often buried deep in the manuscript or hidden in the supplementsโ€”that their โ€œgroundbreakingโ€ findings were based on FMT from a single donor. ๐Ÿคฆโ€โ™‚๏ธ The field suffers from weak methodology and poor reporting standards.

17.06.2025 17:07 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Fecal microbiota transplantation from patients into animals to establish human microbiota-associated animal models: a scoping review - Journal of Translational Medicine Background Fecal microbiota transplantation (FMT) from humans with specific medical conditions to animal models can demonstrate causality by inducing or exacerbating pathophenotypes, linking the gut m...

This field is exploding with potential! ๐Ÿš€ But we need better methods and reporting to truly understand the gut-disease connection.

Hope you find this work (~ 2 years) interesting and helpful in your research!

๐Ÿ”Ž5/5

17.06.2025 16:46 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Our recommendations for better research (short version):
1๏ธโƒฃ Follow GRAFT guidelines (adapted for humanโ†’animal FMT)
2๏ธโƒฃ Use multiple donors
3๏ธโƒฃ Include both sexes (if possible)
4๏ธโƒฃ Verify microbiota colonization
5๏ธโƒฃ Comprehensive outcome assessment
6๏ธโƒฃ Transparent reporting

๐Ÿ”Ž4/5

17.06.2025 16:46 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

MAJOR finding: Huge methodological gaps! ๐Ÿ“‹
๐Ÿ”ธ Many studies use single donors (big generalizability problem!)
๐Ÿ”ธ 86% of studies don't report donor medications
๐Ÿ”ธ Methods vary wildly (fresh vs frozen samples, different volumes)
We need standardization!
๐Ÿ”Ž3/5

17.06.2025 16:46 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

What we found:
๐Ÿ”ธ IBD, IBS, obesity, colorectal cancer & depression = most studied health issues
๐Ÿ”ธ Cancer research focuses heavily on the non-responsivness to immunotherapy
๐Ÿ”ธ Cardiovascular and renal outcomes are surprisingly understudied! ๐Ÿ’”
๐Ÿ”Ž2/5

17.06.2025 16:46 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Fecal microbiota transplantation from patients into animals to establish human microbiota-associated animal models: a scoping review - Journal of Translational Medicine Background Fecal microbiota transplantation (FMT) from humans with specific medical conditions to animal models can demonstrate causality by inducing or exacerbating pathophenotypes, linking the gut m...

We just published the largest scoping review on fecal microbiota transplantation (FMT) from human patients to animals! Our team analyzed 489 studies that tried to go beyond showing CORRELATIONS between gut bacteria and disease, and focused on FMT from patients to animals to prove causality! ๐Ÿ”ฌ

๐Ÿ”Ž1/5

17.06.2025 16:46 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1
Experience Statistics

#statstab #363 p-checker The one-for-all p-value analyzer

Thoughts: Easy way to check for publication bias using some current tools.

#shiny #pvalue #phacking #QRPs #zcurve #bias #pcurve #rindex

shinyapps.org/apps/p-check...

11.06.2025 15:37 โ€” ๐Ÿ‘ 2    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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When should a Nephrologist suspect a mitochondrial disease? | Nefrologรญa Mitochondrial diseases, taking into account those that affect the processes of the respiratory

"Maternally inherited diabetes and deafness is one of the most common mitochondrial diseases. (...) In all three cases, the symptoms were similar: diabetic patient, with hearing loss and renal involvement, non-nephrotic proteinuria and sediment without microhaematuria."

10.06.2025 18:46 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

While slowing eGFR decline would be a major win, I'm struggling to see a pathophysiological basis for an increase in eGFR. Sclerosed glomeruli will not resume function. Seems we must rule out either decreased creatinine production or hyperfiltration as confounders before calling it remission.

06.06.2025 14:43 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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BakRep โ€“ a searchable large-scale web repository for bacterial genomes, characterizations and metadata www.microbiologyresearch.org/content/jour... ๐Ÿงฌ๐Ÿ–ฅ๏ธ Nextflow code: github.com/ag-computati...

04.06.2025 20:03 โ€” ๐Ÿ‘ 20    ๐Ÿ” 10    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1
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Recovery of Tenofovir-induced Nephrotoxicity following Switch from Tenofovir Disoproxil Fumarate to Tenofovir Alafenamide in Human Immunodeficiency Virus-Positive Patients - PubMed Tenofovir-induced nephrotoxicity in HIV-positive patients receiving TDF was mostly reversible after changing to TAF. Thus, TAF-containing regimens can be administered safely to HIV-positive patients w...

Tenofovir-induced tubulopathy can be avoided by using tenofovir alafenamide instead of tenofovir disoproxil fumarate. I would gladly offer it to my patients with chronic hepatitis B, but unfortunately, in Poland, this formulation is available only in combination with other drugs for HIV.

03.06.2025 15:45 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Hearing loss and renal syndromes - Pediatric Nephrology The association between ear and kidney abnormalities has long been recognized; however, the connection between these two disparate organs is not always straightforward. Although Alport syndrome is the...

Alport-like syndrome with thrombocytopenia? Think about MYH9-related disorders (Epstein syndrome, Fechtner syndrome, Mayโ€“Hegglin anomaly, and Sebastian syndrome). MYH9 is the gene encoding nonmuscle myosin IIA.

link.springer.com/article/10.1...

03.06.2025 11:45 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Frontiers | Commentary: Efficacy of probiotics/synbiotics supplementation in patients with chronic kidney disease: a systematic review and meta-analysis of randomized controlled trials The article "Efficacy of probiotics/synbiotics supplementation in patients with chronic kidney disease: a systematic review and meta-analysis of randomi...

Probiotics have strain-specific effects: some may be helpful, and some may do harm. Most systematic reviews on probiotics in CKD are poor quality. I raised methodological concerns about the latest one (doi.org/10.3389/fnut...), but the authors didnโ€™t respond, and it continues to be cited...

01.06.2025 07:22 โ€” ๐Ÿ‘ 4    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Pathophysiology of various MGRS lesions:
By Dr. Nasr at @glomcon.org

25.05.2025 16:01 โ€” ๐Ÿ‘ 10    ๐Ÿ” 5    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

In WoS, PubMed, and Scopus, the number can be interpreted as the number of words between two terms. In PMID 33560326, there are 3 words between "replacement" and "hip". I don't get the logic behind n+1, but I will remember this rule for my future searches.

15.05.2025 21:35 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Changelog

In case you missed it, we recently updated some of our packages, including many new features (again) in the #rstats #easystats {modelbased} package:
easystats.github.io/modelbased/n...
The last weeks we were working a lot on improving support and performance for Bayesian models and especially

15.05.2025 18:10 โ€” ๐Ÿ‘ 14    ๐Ÿ” 5    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Interpreting Log Transformations in a Linear Model | UVA LibraryFederal Depository Library Program

#statstab #343 Interpreting Log Transformations in a Linear Model

Thoughts: Not always a good idea to transform data, but if you do you need to know what it means.

#log #transformation #datatype #data #model #nonlinear #r #guide

library.virginia.edu/data/article...

14.05.2025 20:44 โ€” ๐Ÿ‘ 3    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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a close up of a woman 's face with the words oh my god what is that ALT: a close up of a woman 's face with the words oh my god what is that

ME:

14.05.2025 16:56 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Embase NEAR/2 gives the same results as NEAR/1, W/1, or :~1 in other places ๐Ÿซฃ I noticed the difference when using a new version of Embase "Query translator" and checked it manually.

14.05.2025 16:54 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

@jruszkowski is following 20 prominent accounts