The effect of lead exposure on IQ test scores in children under 12 years: a systematic review and meta-analysis of case-control studies.

Syst Rev · 2022 · PMC9150353 · PMID 35637522

Europe PMC DOI

hedged sentence

—

closest p

—

boldest claim

The sentences

a little significantno p-value reported

A little significant heterogeneity was observed, and all studies reported reduced IQ scores at higher doses and longer duration of exposure.

also in 48 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.