The incidence and prevalence of pterygium in South Korea: A 10-year population-based Korean cohort study.

PLoS One · 2017 · PMC5367680 · PMID 28346495

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a decreasing trendno p-value reported

Our analyses of South Korean national insurance claims data revealed a decreasing trend in the incidence of pterygium during the study period. status released display-pdf yes is-olf no is-manuscript no is-preprint no is-journal-matter no is-scanned no is-retracted no Received 2016 Aug 25; Accepted 2017 Jan 28; Collection date 2017.

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an increasing trendno p-value reported

There was an increasing trend in the prevalences of pterygium and surgically removed pterygium over time (1.0% and 0.3% in 2004, and 2.6% and 0.9% in 2013, respectively).

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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.