This is unholy nonsense of the highest order: - n=92 - over a dozen uncontrolled t-tests - NO DIFFERENCE BETWEEN PLACEBO AND CONTROL - headline findings based on sub-group analyses - fish oil does bugger all for ADHDpic.twitter.com/sP9doRJHg3
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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This is unholy nonsense of the highest order: - n=92 - over a dozen uncontrolled t-tests - NO DIFFERENCE BETWEEN PLACEBO AND CONTROL - headline findings based on sub-group analyses - fish oil does bugger all for ADHDpic.twitter.com/sP9doRJHg3
Study is here: https://www.nature.com/articles/s41398-019-0633-0/tables/1 …
Basically, the researchers gave fish oil or a placebo to kids with ADHD for 12 weeks, and tested them on a range of cognitive processing tasks before and after
Here's their statistical analysis. If this reads like "we threw t-tests at a range of variables until results came out", to you, I'd say your not alonepic.twitter.com/PDRCEWDJgr
The main findings of the research? I'll just let the results table speak for itself. I think it does a brilliant job all by itselfpic.twitter.com/MBV7lvl8ux
JUST LOOK AT THIS A dozen statistical tests. Two 'significant' p-values (with one going in the OPPOSITE DIRECTION i.e. fish oil is bad) Pretty much what we'd expect if there was no difference whatsoeverpic.twitter.com/sw7pYUSGQg
All of the headlines were based on this - a subgroup analysis comparing only children with low baseline levels of EPApic.twitter.com/wzOlum1HXv
In other words, in the tiny subgroup (~30 children) who started off with low levels of fatty acids in their blood, there was a tiny indication that fish oil might be of some modest benefit NOT VERY IMPRESSIVE IS IT
Also, these headlines saying that "fish oil might be as useful as drugs" are total trash THE STUDY DIDN'T LOOK AT DRUGS AT ALL
And in what sense is fish oil not a drug it’s a chemical used to treat/prevent illness.
True but they specifically single out stimulants
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