Re:Study finds link between 'forever chemicals' in cookware ...
by dataangel on Friday August 12, 2022 @03:25PM
(#32442893)
Whether they need a correction depends on how they calculated the p-value. If they only ask one question, "Is the total of these 6 chemicals correlated with liver cancer?" then they only did one test and don't need to correct. The fact that 6 chemicals go into the total doesn't mean they asked more questions, it just means there results only speak to the total amount of that whole class of chemicals in the blood rather than any one of them.
Take a look at the actual study: https://www.jhep-reports.eu/article/S2589-5559(22)00122-7/fu...
And look at table 3.
They are testing 6 different types of PFAS, and only 1 is statistically significant.
They need to be using the Bonferroni Correction because they are checking multiple hypothesis. To do that, you divide the required p-value (0.05) by the number of tests (6). If you do the Bonferroni Correction, none of the PFAS is statistically significant.
Relevant XKCD: https://xkcd.com/882/
Thus the real conclusion is that the study did not find any statistically significant link between 'forever chemicals' and liver cancer.