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dc.contributor.authorAng, M
dc.contributor.authorChong, W
dc.contributor.authorHuang, H
dc.contributor.authorWong, TY
dc.contributor.authorHe, M-G
dc.contributor.authorAung, T
dc.contributor.authorMehta, JS
dc.date.accessioned2020-12-21T03:03:42Z
dc.date.available2020-12-21T03:03:42Z
dc.date.issued2014-07-09
dc.identifierpii: PONE-D-14-01725
dc.identifier.citationAng, M., Chong, W., Huang, H., Wong, T. Y., He, M. -G., Aung, T. & Mehta, J. S. (2014). Determinants of Posterior Corneal Biometric Measurements in a Multi-Ethnic Asian Population. PLOS ONE, 9 (7), https://doi.org/10.1371/journal.pone.0101483.
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/11343/257055
dc.description.abstractPURPOSE: To describe the corneal and anterior segment determinants of posterior corneal arc length (PCAL) and posterior corneal curvature (PCC). METHODS: Cross-sectional, population-based study of 1069 subjects (1069 eyes) aged 40-80 years, from three major Asian ethnic groups. All underwent anterior segment optical coherence tomography imaging and analysis with Zhongshan Angle Assessment Program. Our main outcome measures were determinants of PCAL and PCC using adjusted, multivariate linear regression analysis, adjusted for confounders to obtain the estimated marginal means (EMM) with standard error (SE). RESULTS: The overall mean (± SD) of PCC was: 6.51±0.39 mm; and PCAL was: 12.52±0.59 mm. Malays had a relatively longer PCAL (EMM = 12.74 mm, SE = 0.04 mm) than Chinese (EMM = 12.48 mm, SE = 0.03 mm, P<0.001), and Indians (EMM = 12.42 mm, SE = 0.03 mm, P<0.001). Anterior segment parameters had weak-moderate correlations with PCAL, which included: anterior chamber depth (ACD) (r = 0.55, P<0.001), PCC (r = 0.27, P<0.001), anterior corneal curvature (ACC) (r = 0.14, P<0.001) and central corneal thickness (CCT) (r = -0.07, P = 0.023). In multivariate analysis, anterior segment parameters explained only 37.6% of the variance of PCAL, with ACD being the most important determinant (partial R2  = 0.300; P<0.001). The determinants of PCC included ACC, PCAL and CCT (explaining 72.1% variation of PCC), with ACC being the most important determinant (partial R2  = 0.683; P<0.001). CONCLUSION: There was moderate correlation of PCAL with ACD, but anterior segment parameters accounted for only a small proportion of the variation in PCAL. The significant differences in PCAL and PCC amongst different Asian ethnic groups suggests that there is a need to consider this factor when planning for anterior segment surgeries such as endothelial keratoplasty.
dc.languageEnglish
dc.publisherPUBLIC LIBRARY SCIENCE
dc.titleDeterminants of Posterior Corneal Biometric Measurements in a Multi-Ethnic Asian Population
dc.typeJournal Article
dc.identifier.doi10.1371/journal.pone.0101483
melbourne.affiliation.departmentOphthalmology (Eye & Ear Hospital)
melbourne.source.titlePLoS One
melbourne.source.volume9
melbourne.source.issue7
dc.rights.licenseCC BY
melbourne.elementsid1112088
melbourne.contributor.authorHe, Mingguang
dc.identifier.eissn1932-6203
melbourne.accessrightsOpen Access


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