Prevalence of pterygium in Iran
A systematic review and meta-analysis study
Keywords:
Pterygium, Eye, Prevalence, IranAbstract
Background and aim: Pterygium is one of the most prevalent pathologies involving the cornea, which can lead
to various vision signs and even reduction in eyesight. No accurate estimate has been reported about the
prevalence of pterygium in Iran. Hence, this study aimed to determine the pterygium prevalence in Iran by meta- analysis method.
Methods: Searching for data of the last eleven years (from 2004 to 2015) was conducted using the keywords of
pterygium, eye, and Iran in International and domestic indexing services and databases including Iranmedex,
Scientific Information Database (SID), Magiran, Irandoc, Medlib, IranPsych, Science Direct, Web of Science
(Thomson Reuters), PubMed, and Scopus. The data were analyzed using the meta-analysis method (the random
effects model). The disharmony of the studies was investigated using the I2 index. The data were analyzed by
STATA Ver.11 software.
Results: In 5 studies conducted in Iran, with a sample size of 10,838 people between 2004 and 2015, the extent
of the prevalence was estimated to be 11% (95% CI: 3 to 18%). Also, the prevalence of pterygium in women and
men was 18% and 13%, respectively.
Conclusion: According to the published reports from Iran and its comparison with other points in the world, the
prevalence of pterygium in Iran is high, especially among women.
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