A retrospective survey of strabismus surgery in a tertiary eye center in northern China, 2014-2019.

BMC Ophthalmol · 2021 · PMC7809797 · PMID 33446145

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showed a trendno p-value reported

Both the child and their parents’ health-related quality of life showed a trend toward correlating with clinical severity [ 17 , 18 ].

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.