Women in Michigan who were exposed to a chemical called PBB years ago report having ADHD more often than usual—about 1 in 9—so researchers wonder if the exposure might be linked to more ADHD cases or if they're just more aware of it.

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Against

Evidence from Studies

Supporting (1)

50

Community contributions welcome

50

Exploring autism spectrum disorder (ASD) and attention deficit disorder (ADD/ADHD) in children exposed to polybrominated biphenyl

Case-Control Study

Human

2024 Apr

The study found that 11.11% of women in the exposed group reported having ADHD, which matches the number in the claim and is higher than usual, so it supports that part.

Contradicting (0)

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Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Exploring autism spectrum disorder (ASD) and attention deficit disorder (ADD/ADHD) in children exposed to polybrominated biphenyl

Score: 50

DOI: 10.1097/EE9.0000000000000304

Similar Assertions

People who were exposed to a chemical called PBB-153 as babies or before birth — because of a pollution incident in Michigan in 1973 — were no more likely to be diagnosed with ADHD as kids or adults than those with less exposure.

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88%

In a group of people from Michigan exposed to a chemical called PBB-153, their body levels of this chemical weren’t linked to another similar group of chemicals (PCBs), meaning they’re likely coming from different sources and can be studied separately.

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75%