{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T10:04:31Z","timestamp":1776852271619,"version":"3.51.2"},"reference-count":34,"publisher":"BMJ","issue":"5","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Br J Ophthalmol"],"accepted":{"date-parts":[[2025,10,26]]},"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>To assess subfoveal choroidal thickness (SFCT) and its associations in school children in a Russian population.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The Ural Children Eye Study (UCES), a school-based case-control study, was performed in Ufa\/Bashkortostan\/Russia from 2019 to 2022 and included 4933 children (mean age: 9.7\u00b12.6 years; range: 6.2\u201318.8 years). The children underwent a series of ophthalmological and systemic examinations. Optical coherence tomographic (OCT) images of the macula were obtained in a randomly selected subgroup.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Out of 4933 children primarily participating in the UCES, a randomly selected group of 1462 (29.6%) children underwent OCT. Thicker SFCT (mean: 322\u00b182\u2009\u00b5m; median: 317\u2009\u00b5m; range: 105\u2013691\u2009\u00b5m) was associated (multivariable analysis) with the systemic parameters of older age (beta: 0.15; B: 3.99; 95%\u2009CI 0.91, 7.08; p=0.01), taller body height (beta: 0.17; B: 0.78; 95%\u2009CI 0.27, 1.29; p=0.003), earlier school start in the morning (beta: \u22120.07; B: \u22125.60; 95%\u2009CI \u22129.42, \u20131.88; p=0.004), lower prevalence of actively resting during studying (beta: \u22120.06; B: \u22128.80; 95%\u2009CI \u221215.6, \u20131.98; p=0.01) and earlier time of going to bed in the evening (beta: \u22120.07; B: \u22120.68; 95% CI \u22121.20, \u20130.15; p=0.01), and the ocular parameters of shorter axial length (beta: \u22120.59; B: \u221246.8; 95%\u2009CI \u201353.0, \u201340.5; p&lt;0.001), lower corneal refractive power (beta: \u22120.18; B: \u221210.3; 95%\u2009CI \u221223.9, \u20136.81; p&lt;0.001) and deeper anterior chamber depth (beta: 0.12; B: 36.4; 95%\u2009CI 17.7, 55.2; p&lt;0.001). It was not significantly associated with sex (p=0.87), body Mass Index (p=0.88) and best-corrected visual acuity (p=0.18). Mean inter-eye SFCT difference (39.3\u00b135.5\u2009\u00b5m; median: 30\u2009\u00b5m; range: 0.00\u2013259\u2009\u00b5m) was related with inter-eye difference in axial length (beta: \u22120.29; B: \u221257.1; 95%\u2009CI \u201366.9, \u201347.4; p&lt;0.001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>In this ethnically mixed school children population from Russia, in contrast to studies on adult individuals, SFCT increased with older age. As in adults, however, at a more marked degree compared with adults, it decreased with longer axial length, by approximately 47\u2009\u00b5m for each mm of longer axial length in multivariable analysis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bjo-2025-328021","type":"journal-article","created":{"date-parts":[[2025,11,9]],"date-time":"2025-11-09T18:20:14Z","timestamp":1762712414000},"page":"520-526","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Choroidal thickness and associated factors in children: the Ufa Children Eye Study"],"prefix":"10.1136","volume":"110","author":[{"given":"Mukharram M","family":"Bikbov","sequence":"first","affiliation":[{"name":"Ufa Eye Research Institute, Ufa, Bashkortostan, Russian Federation"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gyulli M","family":"Kazakbaeva","sequence":"additional","affiliation":[{"name":"Ufa Eye Research Institute, Ufa, 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