Time trend of axial length and associated factors in 4- and 5-year-old children in Shanghai from 2013 to 2019

Purpose To evaluate the time trend of axial length (AL) and associated factors in 4- and 5-year-old children in Shanghai from 2013 to 2019. Methods This was a 7-year observational study of 985 four-year-old and 1059 five-year-old children in Shanghai. AL, horizontal and vertical corneal curvature, s...

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Bibliographic Details
Published in:International ophthalmology 2021-03, Vol.41 (3), p.835-843
Main Authors: Li, Tao, Wan, Ting, Yao, Xiaoqian, Qi, Huihong, Chen, Xuefeng, She, Man, Hu, Qianqian, Zhou, Xiaodong
Format: Article
Language:English
Subjects:
Body height
Children
Cornea
Correlation analysis
Curvature
Elongation
Environmental risk
Longitudinal studies
Medicine
Medicine & Public Health
Ophthalmology
Original Paper
Risk analysis
Risk factors
Weight
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Summary:Purpose To evaluate the time trend of axial length (AL) and associated factors in 4- and 5-year-old children in Shanghai from 2013 to 2019. Methods This was a 7-year observational study of 985 four-year-old and 1059 five-year-old children in Shanghai. AL, horizontal and vertical corneal curvature, spherical equivalent (SE), and body height and weight were measured. Furthermore, a questionnaire was collected, including time outdoors and bad eyesight habits. Results In 4-year-old children, no significant difference was found in AL ( P  = 0.526), but significant differences were observed in SE ( P  = 0.001), horizontal corneal curvature ( P  = 0.006), vertical corneal curvature ( P  = 0.004), height ( P  
ISSN:0165-5701
1573-2630
DOI:10.1007/s10792-020-01637-5