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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Subfoveal choroidal thickness at age 9 years in relation to clinical and perinatal characteristics in the population-based Generation R Study

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  • Kevser Zehra Biyik
  • Jan Willem L. Tideman
  • Jan Roelof Polling
  • Gabriëlle H.S. Buitendijk
  • Vincent V.W. Jaddoe
  • Michael Larsen
  • Caroline C.W. Klaver
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Purpose: To assess the association between clinical and perinatal characteristics and subfoveal choroidal thickness in 9-year-old children. Methods: The study included data from the population-based Generation R cohort, whose participants underwent cycloplegic refractometry, ocular biometry, height, weight and subfoveal choroidal thickness measurements using a swept-source optical coherence tomography (SS-OCT) instrument. Birth parameters were obtained using medical records. Statistical analyses were performed using multivariate regression models adjusted for age, ethnicity and sex. Results: A total of 1018 children (52.5% girls, 47.5% boys) with a mean age of 9.9 ± 0.3 years and a mean cycloplegic spherical equivalent refraction of 0.80 ± 1.1 D in boys and 0.81 ± 1.4 in girls were eligible for analysis. The subfoveal choroid was 17 μm thicker in girls (298 ± 60.6 μm) than in boys (281 ± 55.0 μm; p < 0.001), a difference of 9.1 μm persisting after adjustment for age, ethnicity and axial length (p = 0.017). Subfoveal choroidal thickness decreased with increasing ocular axial length (−16.2 μm/mm, 95% CI −21.2 to −12.4, p < 0.001) and with increasing myopic refraction (−10.0 μm/D, 95% CI 6.8–13.1; p < 0.001, adjusted for age, ethnicity, axial length and sex) while it increased with increasing body height (1.3 μm/cm, 95% CI 0.8 to 1.9, p < 0.001). Additionally, choroidal thickness increased with increasing birthweight (13.0 μm/kg; 95% CI 0.006–0.020; p < 0.001) and increasing size for gestational age (8.2 μm/kg; 95% CI 4.6–11.8; p < 0.001). Smoking up until the time that pregnancy became known was associated with a thinner choroid (p = 0.016). There was no detectable effect of alcohol consumption. The distributions of axial length, refraction and choroidal thickness were narrower than in older populations. Conclusion: The subfoveal choroid was thicker in girls than in boys, and higher body height, higher birthweight and larger size for gestational age were associated with a thicker subfoveal choroid. The implications of these findings for myopia development need further evaluation in longitudinal studies.

Original languageEnglish
JournalActa Ophthalmologica
Volume98
Issue number2
Pages (from-to)172-176
Number of pages5
ISSN1755-375X
DOIs
Publication statusPublished - 1 Mar 2020

    Research areas

  • children, choroidal thickness, optical coherence tomography, population study

ID: 59452383