Essential Trace Elements Zinc, Iron, Copper and Attention-Deficit/Hyperactivity Disorder in Children and Adolescents: A Systematic Review and Meta-Analysis of Case-Control Studies.

Nutrients · 2026 · PMC13258722 · PMID 42280439

Europe PMC DOI

hedged sentence

—

closest p

—

boldest claim

The sentences

did not reach statistical significanceno p-value reported

In the analysis restricted to participants aged <12 years, the difference approached but did not reach statistical significance (SMD = −0.66, 95% CI: −1.48 to 0.15).

also in 111,027 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.