Exploring the link between toxic metal exposure and ADHD: a systematic review of pb and hg.

J Neurodev Disord · 2024 · PMC11292919 · PMID 39090571

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an increasing trendno p-value reported

Globally, ADHD affects approximately 5% of children and adolescents, with an increasing trend observed in recent years [ 1 ].

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a decreasing trendno p-value reported

In contrast, Andrews discovered a decreasing trend in ADHD by immunization dosage in 2004 [ 106 ].

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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.