So, this is doing the rounds, and an 8.5-point drop in IQ does seem terrifying post-COVID, but I think there are a few things about the study that are worth pointing outhttps://twitter.com/AliNouriPhD/status/1318967587796099074 …
Epidemiologist. Writer (Guardian, Observer etc). "Well known research trouble-maker". PhDing at @UoW Host of @senscipod Email gidmk.healthnerd@gmail.com he/him
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Health Nerd Retweeted Dr. Ali Nouri
So, this is doing the rounds, and an 8.5-point drop in IQ does seem terrifying post-COVID, but I think there are a few things about the study that are worth pointing outhttps://twitter.com/AliNouriPhD/status/1318967587796099074 …
Health Nerd added,
You can find the study here. It's a fairly simple examination of a very large database of people doing psychometric tests online in Britainhttps://www.medrxiv.org/content/10.1101/2020.10.20.20215863v1 …
The researchers recruited 84,000 people starting in December 2019, and mostly in the months of January and May 2020, to do a series of tests that measure cognitive ability (not IQ per se, but similar in nature)
They found that those who reported having more symptoms consistent with COVID-19 had a lower score on these cognitive tests, and therefore concluded that "COVID-19 infection likely has consequences for cognitive function" Scary!pic.twitter.com/RREN4DWHGQ
But astute readers will probably already see an issue here If they recruited starting in December, and had many responses in January in Britain...how could these people have been COVID-19 patients?
Long story short: they weren't. Of the 84,000 people who did the cognitive tests, only ~361~ reported having a confirmed case of COVID-19 That's, uh, not idealpic.twitter.com/18JzpMih74
Now, while this did represent the majority of hospitalized cases, it's still a bit of a problem for a paper looking at COVID-19 specifically to have very few cases of COVID-19 to examine!
I think it's probably fair to say that the results show that people who have recently experienced a major hospitalization have worse cognitive processing than people who haven't
I definitely don't think that you can infer from this research anything in particular about COVID-19 infections and IQ in general
An important point to make. Other research has shown hospitalisation in older patients often followed by drop in cognitive function. This seems more prevalent in patients with cardiovascular (co)morbidities. In any case, lack of specificity to Covid-19 doesn't negate the problem.
It doesn't, but I think it's important to note. It's not exactly surprising that being ventilated might cause some secondary health issues!
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