Geographical prevalence and risk factors for pterygium: a systematic review and meta-analysis.

BMJ Open · 2013 · PMC3840351 · PMID 24253031

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a significant trendno p-value reported

There was a significant trend of greater prevalence for pterygium at older ages (40–49 vs 50–59 vs 60–69 years, 11% vs 15.6% vs 20.1%), and the trends were generally similar between the 60–69 and over 70 years age groups (20.1% vs 20.2%).

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