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    Disordered Sleep and Myopia Risk among Chinese Children

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    Author
    Zhou, Z; Morgan, IG; Chen, Q; Jin, L; He, M; Congdon, N
    Date
    2015-03-26
    Source Title
    PLoS One
    Publisher
    PUBLIC LIBRARY SCIENCE
    University of Melbourne Author/s
    He, Mingguang
    Affiliation
    Ophthalmology (Eye & Ear Hospital)
    Metadata
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    Document Type
    Journal Article
    Citations
    Zhou, Z., Morgan, I. G., Chen, Q., Jin, L., He, M. & Congdon, N. (2015). Disordered Sleep and Myopia Risk among Chinese Children. PLOS ONE, 10 (3), https://doi.org/10.1371/journal.pone.0121796.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/257054
    DOI
    10.1371/journal.pone.0121796
    Abstract
    PURPOSE: Disordered sleep and myopia are increasingly prevalent among Chinese children. Similar pathways may be involved in regulation of both sleep cycles and eye growth. We therefore sought to examine the association between disordered sleep and myopia in this group. METHODS: Urban primary school children participating in a clinical trial on myopia and outdoor activity underwent automated cycloplegic refraction with subjective refinement. Parents answered questions about children's sleep duration, sleep disorders (Children's Sleep Habits Questionnaire [CSHQ]), near work and time spent outdoors. RESULTS: Among 1970 children, 1902 (96.5%, mean [standard deviation SD] age 9.80 [0.44] years, 53.1% boys) completed refraction and questionnaires. Myopia < = -0.50 Diopters was present in both eyes of 588 (30.9%) children (1329/3804 = 34.9% of eyes) and 1129 children (59.4%) had abnormal CSHQ scores (> 41). In logistic regression models by eye, odds of myopia < = -0.50D increased with worse CSHQ score (Odds Ratio [OR] 1.01 per point, 95% Confidence Interval [CI] [1.001, 1.02], P = 0.014) and more night-time sleep (OR 1.02, 95% CI [1.01, 1.04, P = 0.002], while male sex (OR 0.82, 95% CI [0.70, 0.95], P = 0.008) and time outdoors (OR = 0.97, 95% CI [0.95, 0.99], P = 0.011) were associated with less myopia. The association between sleep duration and myopia was not significant (p = 0.199) for total (night + midday) sleep. CONCLUSIONS: Myopia and disordered sleep were both common in this cohort, but we did not find consistent evidence for an association between the two. TRIAL REGISTRATION: clinicaltrials.gov NCT00848900.

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