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Eric Fauman (he/him) @ericfauman.bsky.social · 10d

I did filter to p < 5e-8. But we also some filtering to independent lead snps. We also have sissies studies ranging from n of a few hundred to a few million subjects.

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Eric Fauman (he/him) @ericfauman.bsky.social · 10d

It's a little odd. I am plotting the log10 of the -log10(pvalue) on the x axis so in this plot the null signal drops off much faster than what we observe in the @gwascatalog.bsky.social
I'm curious if anyone has a hypothesis why the lead SNP p-values would have this distribution.

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Eric Fauman (he/him) @ericfauman.bsky.social · 10d

Sounds great!

Eric Fauman (he/him) @ericfauman.bsky.social · 11d

The effect size in gwas catalog are harder to compare because they are not necessarily in standard deviation units.

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Eric Fauman (he/him) @ericfauman.bsky.social · 11d

Oh you win! Yes, all are inappropriate attempts to avoid underflows.

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Eric Fauman (he/him) @ericfauman.bsky.social · 11d

Bonus question. Why is the plot of log10(count) as a function of log10(-log10(p)) a straight line?

Recall, the data is all the lead SNPs recorded in the GWAS catalog.

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Eric Fauman (he/him) @ericfauman.bsky.social · 11d

Quick quiz. This is a plot of how often each p-value appears in this @gwascatalog.bsky.social. Actually I binned the -log10(p) values to their integer values (e.g., 8-9, 9-10, etc).

I'm highlighting 3 outliers here, in orange.

What are these p-values and why do they diverge so much?

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Eric Fauman (he/him) @ericfauman.bsky.social · 11d

Getting ready for ASHG25 here in Boston! Who's coming to town?
As you know, I am fascinated by extreme GWAS p-values.

Will we see anything beyond the current record holder, 10^-28538, for eye color.

Interestingly, the p-values for all lead SNPs in the @gwascatalog.bsky.social follow a power law

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Eric Fauman (he/him) @ericfauman.bsky.social · Aug 16

For fun I'm also tracking the room temperature, humidity and CO2 which all increase during the workout, as expected.

All the analysis, charting and graphs were done by GPT5 operating on a google sheet where I collected the minute by minute stats.

Eric Fauman (he/him) @ericfauman.bsky.social · Aug 16

GPT4o pointed me to a device that measures core and skin body temperature. In gold you can see my core body temp continues to rise even after I reach my max heart rate (red), thus requiring further decreases in the work output (blue). Skin temperature drops during the workout, thanks to fans + sweat

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Eric Fauman (he/him) @ericfauman.bsky.social · Aug 16

This graph plots a study I did on myself which involves trying to maintain a heart rate of exactly 123 bpm for 45 minutes. Doing so requires adjusting the work output. In this plot the red line is my heart rate while the blue line is the work output, which you can see decreases over time.

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Eric Fauman (he/him) @ericfauman.bsky.social · Aug 16

Specifically, the phenomenon is called cardiovascular drift and it is a consequence of the body having to do the mechanical work and then also additional work to dissipate the heat generated by the effort, especially the vasodilation to direct internal body heat to the surface.

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Eric Fauman (he/him) @ericfauman.bsky.social · Aug 16

Years ago I asked on Twitter why my heart rate would continue to climb even after I fixed the speed and incline on my treadmill. At the time, no one on Twitter could give me a satisfactory answer.
But now GPT4o was able to answer it and suggested approaches to quantify the phenomenon.

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Eric Fauman (he/him) @ericfauman.bsky.social · Aug 16

Isn't that the beginning of the movie "Brazil"?

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Eric Fauman (he/him) @ericfauman.bsky.social · Jun 24

This was the random page on the internet that set me down this rabbit hole:

www.tomsguide.com/wellness/fit...

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Reposted by Eric Fauman (he/him)

Aaron Rupar @atrupar.com · Jun 24

DeGETTE: Will you commit that neither you or anyone else at HHS will take retaliatory action against the brave scientists at NIH? Should be an easy answer bc it's illegal

RFK Jr: I can commit that we are absolutely depoliticizing science at NIH for the first time

D: I asked you a simple question

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Eric Fauman (he/him) @ericfauman.bsky.social · Jun 23

It could be like designing an antibody to reduce circulating cystatin C levels in an attempt to improve kidney function...

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Eric Fauman (he/him) @ericfauman.bsky.social · Jun 23

And if that's the case, then we haven't really established a causal link between making people walk faster and seeing them age slower.

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Eric Fauman (he/him) @ericfauman.bsky.social · Jun 23

This makes no sense to me.

How does genetically predicted walking speed relate to biological aging (here as telomere length( except as some sort of biomarker of overall health?

www.nature.com/articles/s42...

Investigation of a UK biobank cohort reveals causal associations of self-reported walking pace with telomere length - Communications Biology

Mendelian randomisation analysis of the UK Biobank cohort, supported by analyses of accelerometer-measured activity intensity, reveals that genetically-determined walking pace is associated with longe...

www.nature.com

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Eric Fauman (he/him) @ericfauman.bsky.social · Jun 7

To add to your weekend reading, check out this nice report on the Genes & Health cohort from Hye In Kim, David van Heel and many many more:

www.medrxiv.org/content/10.1...

Exome sequencing and analysis of 44,028 British South Asians enriched for high autozygosity

Genes and Health (G&H) is a biomedical study of adult British-Pakistani and -Bangladeshi research volunteers enriched for autozygosity. We performed whole exome sequencing in 44,028 G&H participants, ...

www.medrxiv.org

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Eric Fauman (he/him) @ericfauman.bsky.social · May 26

Signed

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Eric Fauman (he/him) @ericfauman.bsky.social · May 26

Please consider signing.

Carl T. Bergstrom @carlbergstrom.com · May 26

I helped draft this open letter about last Friday’s gold standard science executive order. Take a look and consider signing if you agree.

Stand Up for Science! @standupforscience.bsky.social · May 26

🚨 URGENT RESPONSE CALL 🚨

Trump’s Fool’s Gold Science EO is a dangerous sham.
It gives his appointees the power to dismiss entire bodies of research and punish researchers who fail to fall in line with his agenda.

We’ve launched an open letter.

SIGN & SHARE NOW: actionnetwork.org/petitions/op...

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Eric Fauman (he/him) @ericfauman.bsky.social · May 26

Thanks for these caveats.
I guess I'm just surprised a major chromosomal rearrangement can fix in a population so quickly with no apparent impact on the effective population size. Is there good literature on this across other species.

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Eric Fauman (he/him) @ericfauman.bsky.social · May 25

(I did hedge a bit in my opening post calling it a "possible bottleneck")...

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Reposted by Eric Fauman (he/him)

Yang Luo @y-luo.bsky.social · May 25

Pirruccello #eshg2025 - “There is really one game in town right now that is @ukb UKB.” - no one else is producing image data in healthy heart at this scale. @ukbiobank.bsky.social Taking a deep-dive into image-derived phenotypes such as sphericity and cardiac age acceleration.

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