Cadmium exposure and neurodevelopmental outcomes in U.S. children.

Environ Health Perspect · 2012 · PMC3346779 · PMID 22289429

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a nonsignificant trendno p-value reported

(2007) reported a nonsignificant trend of increasing odds of ADHD with increasing blood cadmium levels that was not present after adjustment for persistent organic pollutants based on an analysis of 1999–2000 NHANES data.

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did not reach statistical significanceno p-value reported

Our findings for ADHD did not reach statistical significance, but the direction of the association suggests a possible decreased risk of ADHD diagnosis in children with urinary cadmium levels above the 25th percentile.

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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.