Abstract:Background
Visual impairment is a common child health problem. We hopes to analyze the regional trend, related factors and spatial distribution of children's visual impairment in Shandong province, to explore the spatial changes brought by time and their influencing factors, so as to provide scientific basis for prevention of childhood visual impairment.
Methods
This study covers 5 complete cross-sectional surveys (Physical examination data in Shandong province) from 2013 to 2017, involving about 29.24 milli… Show more
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