Role of Caffeine Intake on Erectile Dysfunction in US Men: Results from NHANES 2001-2004.

PLoS One · 2014 · PMC4412629 · PMID 25919661

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a significant trendno p-value reported

Among men without diabetes ( Fig 4 ), we found that men in every caffeine intake quintile reported a lower likelihood of prevalent ED showing a significant trend for this association ( P trend = 0.01).

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did not reach statistical significanceno p-value reported

Yet, the interaction effect did not reach statistical significance ( P interaction = 0.65).

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