I think I found a major (conclusion-flipping) statistical error in a paper in an AMA journal. Did I?
If I messed up, I'd like to know how; I hope someone can point me in the direction of my errors. If I messed up, I must have made at least two major errors, as I came to the same conclusion in two independent ways. I communicated with the journal editor and corresponding author.
Here, you can find the paper and the correspondence. I reproduce it below.
To try to make this question fully self-contained, I'll summarize the issue.
The authors calculate the background rate of sudden sensorineural hearing loss (SSNHL) per year and compare it to the rate of SSNHL over a three-week post-intervention period, and graph "Estimated incidence of SSNHL, per 100 000 per y". Their conclusion is that the data indicates the intervention does not increase the incidence of SSNHL; a substantially and significant reduction is indicated.
They state that "We then estimated the incidence of SSNHL that occurred after vaccination on an annualized basis." But this cannot be what they calculated. It is incompatible with what they report is the data their research yielded.
It’s an error to limit the possible adverse side effect window to 3 weeks post-vaccination (excluding adverse events outside that window) but then spread the remaining adverse events over a year to calculate risk on an annualized basis.". It’s unjustifiable. A reasonable start for comparison would be to compare risk over the 3 weeks to the annual (52-week) risk, scaled to 3 week period. So the correct finding, based on their research, appears to be no risk difference over a 3 week period of SSNHL between groups, (0.6-4.4 vs 0.3-4.1, n.s.).
Their conclusion implies that the authors have discovered that the intervention reduced SSNHL by about 94%. Which would be a groundbreaking discovery if confirmed, and a there’s no plausible mechanism presented for such a miraculous treatment effect, more evidence of grave error. It does not pass this basic plausibility test.
As I finished writing this up, I found further concerns, which
I'll put in an answer.I put in chat: https://chat.stackexchange.com/rooms/18/ten-fold because preliminary.
Again, here, you can find the paper and the correspondence. I reproduce it immediately below.
I wrote: (slightly modified)
I write in respect to *.
I may have found an error in this paper. I'm thinking: It’s an error to limit the possible adverse side effect window to 3 weeks post-vaccination (excluding adverse events outside that window) but then spread the remaining adverse events over a year to calculate risk. It’s unjustifiable. A reasonable start for comparison would be to compare risk over the 3 weeks to the annual (52-week) risk, scaled to 3 week period. So the correct finding appears to be that risk in a 3 week period of SSNHL, whether vaccinated or unvaccinated, is the same (0.6-4.4 vs 0.3-4.1, n.s.). A closer look at adverse events within shorter periods after vaccination would be an appropriate topic for further research. Another way to see this error is to consider whether the original results pass a basic plausibility test. They do not. If the results shown in the figure accurately reflected Incidence Range / 100k of SSNHL between the vaccinated and unvaccinated, then it would suggest that the authors had discovered that vaccination reduced SSNHL by about 94%. Which would be a groundbreaking discovery, and a there’s no plausible mechanism presented for such a miraculous treatment effect, this is more evidence of grave error.
*Formeister EJ, et. al. JAMA Otolaryngol Head Neck Surg. 2021;147(7):674–676. doi:10.1001/jamaoto.2021.0869
Assuming I have, this won't my first time spotting a major error in a peer-reviewed publication. (I think that was in article High-fructose corn syrup causes characteristics of obesity in rats: Increase body weight, body fat and triglyceride levels (2010) in 2010. This HFCS, Bocarsly, Princeton paper was wildly popular in the lay press.)
Yet I received this non-response response (emphasis mine):
Thank you very much for your recent communication about the paper w published in JAMA Otolaryngology ("Preliminary Analysis of Association Between COVID-19 Vaccination and Sudden Hearing Loss Using VAERS"). As a peer reviewed publication this manuscript was vetted in a process that includes assessment and validation of hypotheses, methodologies, and conclusions. Readers and scientists can have faith in the integrity of these robust processes. We look forward to seeing this important field expand and would encourage all interested scientists to consider peer reviewed publication of their work in the field. We would encourage a thoughtful re-read of the manuscript to understand the methodology, and additional reading on the topics of idiopathic sudden sensorineural hearing loss and principles of epidemiology, for your understanding. Respectfully, Dr. Eric Formeister, MD, MS on behalf of the authors.
-- If I messed up, I'd like to know ; I hope someone can point me in the direction of my error(s).