Abstract：
PURPOSE:We sought to assess the effects of exposure to secondhand smoke (SHS) on peripapillary retinal nerve fiber layer (p-RNFL) thickness in children. DESIGN:Cross-sectional study. METHODS:Children 6-8 years of age were consecutively recruited from the population-based Hong Kong Children Eye Study. All participants received comprehensive ophthalmic examinations and p-RNFL thickness was measured by spectral-domain optical coherence tomography. SHS data were derived from a validated questionnaire. Associations between p-RNFL thickness and SHS exposure status, number of smokers in the family, and quantity of smoking in the family were determined by multivariate linear regression after adjusting for potential confounders. RESULTS:Among the Hong Kong Children Eye Study cohort (n = 3,103), approximately one-third of children were exposed to SHS (35.4%, n = 1,097). Compared to those without exposure to SHS, children exposed to SHS had similar age (P = .83), gender (P = .17), body mass index (P = .44), birth weight (P = .23), and axial length (P = .34), but had lower family income (P < .001) and lower parental education level (P < .001). After adjusting for all the above factors, exposure to SHS was associated with a thinner global p-RNFL by 4.4 μm (P < .001). Reduced p-RNFL was also associated with increased numbers of smokers in the family (β = -3.40, P < .001) and increased quantity of SHS (β = -0.22, P < .001). CONCLUSIONS:Exposure to SHS in children was associated with a thinner p-RNFL. A thinner p-RNFL may increase the risk of irreversible visual impairment in the future. Our results provide evidence to recommend that children avoid exposure to SHS.
journal_name
Am J Ophthalmoljournal_title
American journal of ophthalmologyauthors
Li J,Yuan N,Chu WK,Cheung CY,Tang S,Li FF,Chen LJ,Kam KW,Young AL,Ip P,Tham CC,Pang CP,Yam JCdoi
10.1016/j.ajo.2020.10.016subject
Has Abstractpub_date
2020-10-29 00:00:00pages
91-99eissn
0002-9394issn
1879-1891pii
S0002-9394(20)30584-5journal_volume
223pub_type
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