Fig 1.
PRISMA flow chart.
Table 1.
Main characteristics of the retained studies (n = 47).
Table 2.
Multilevel univariate and multivariate meta-regression models of the various factors related to the prevalence of pterygium.
Fig 2.
The geographical distribution of population, pterygium prevalence and number of people with pterygium in China in 2010.
(a) number of population; (b) overall prevalence of pterygium; (c) number of people with pterygium. The map was created by PGS using ArcMap version 10.1 (Environmental Systems Research Institute, Redlands, CA).
Fig 3.
Gender- and age-specific prevalence of pterygium and numbers of people living with pterygium in 2010.
Table 3.
Estimated gender- and age-specific prevalence of pterygium and number of people living with pterygium in China in 2010.