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Determinants of posterior corneal biometric measurements in a multi-ethnic Asian population.

Publication ,  Journal Article
Ang, M; Chong, W; Huang, H; Wong, TY; He, M-G; Aung, T; Mehta, JS
Published in: PLoS One
2014

PURPOSE: 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.

Duke Scholars

Published In

PLoS One

DOI

EISSN

1932-6203

Publication Date

2014

Volume

9

Issue

7

Start / End Page

e101483

Location

United States

Related Subject Headings

  • Tomography, Optical Coherence
  • Singapore
  • Multivariate Analysis
  • Middle Aged
  • Male
  • Malaysia
  • Linear Models
  • India
  • Image Interpretation, Computer-Assisted
  • Humans
 

Citation

APA
Chicago
ICMJE
MLA
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Ang, 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), e101483. https://doi.org/10.1371/journal.pone.0101483
Ang, Marcus, Wesley Chong, Huiqi Huang, Tien Yin Wong, Ming-Guang He, Tin Aung, and Jodhbir S. Mehta. “Determinants of posterior corneal biometric measurements in a multi-ethnic Asian population.PLoS One 9, no. 7 (2014): e101483. https://doi.org/10.1371/journal.pone.0101483.
Ang M, Chong W, Huang H, Wong TY, He M-G, Aung T, et al. Determinants of posterior corneal biometric measurements in a multi-ethnic Asian population. PLoS One. 2014;9(7):e101483.
Ang, Marcus, et al. “Determinants of posterior corneal biometric measurements in a multi-ethnic Asian population.PLoS One, vol. 9, no. 7, 2014, p. e101483. Pubmed, doi:10.1371/journal.pone.0101483.
Ang M, Chong W, Huang H, Wong TY, He M-G, Aung T, Mehta JS. Determinants of posterior corneal biometric measurements in a multi-ethnic Asian population. PLoS One. 2014;9(7):e101483.

Published In

PLoS One

DOI

EISSN

1932-6203

Publication Date

2014

Volume

9

Issue

7

Start / End Page

e101483

Location

United States

Related Subject Headings

  • Tomography, Optical Coherence
  • Singapore
  • Multivariate Analysis
  • Middle Aged
  • Male
  • Malaysia
  • Linear Models
  • India
  • Image Interpretation, Computer-Assisted
  • Humans