Systematic review of the epidemiology of acne vulgaris.

Sci Rep · 2020 · PMC7113252 · PMID 32238884

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a decreasing trendno p-value reported

After reaching the late teenage years or young adulthood, acne prevalence rates follow a decreasing trend with increasing age 19 , 20 .

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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.