4.6 Article

Associations with Intraocular Pressure in a Large Cohort Results from the UK Biobank

Journal

OPHTHALMOLOGY
Volume 123, Issue 4, Pages 771-782

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.ophtha.2015.11.031

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Funding

  1. Alcon
  2. Allergan
  3. Welsh Assembly Government
  4. British Heart Foundation
  5. Diabetes UK
  6. MRC/RCOphth Clinical Training Fellowship [G1001939/1]
  7. International Glaucoma Association
  8. Wellcome Trust [094791/Z/10/Z]
  9. Richard Desmond Charitable Trust via Fight for Sight
  10. Special Trustees of Moorfields Eye Hospital [ST 12 09]
  11. Department for Health [BRC2_009]
  12. Zeiss
  13. Wellcome Trust [094791/Z/10/Z] Funding Source: Wellcome Trust
  14. MRC [G1001939, MR/L023784/2] Funding Source: UKRI
  15. Fight for Sight [1895/96] Funding Source: researchfish
  16. Medical Research Council [MC_qA137853, G1001939, G1000143, MR/K006584/1, MR/L023784/2] Funding Source: researchfish
  17. National Institute for Health Research [NF-SI-0512-10101, NF-SI-0512-10114, CL-2010-18-004, CL-2010-14-004, CS-2014-14-023] Funding Source: researchfish

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Purpose: To describe the associations of physical and demographic factors with Goldmann-correlated intraocular pressure (IOPg) and corneal-compensated intraocular pressure (IOPcc) in a British cohort. Design: Cross-sectional study within the UK Biobank, a large-scale multisite cohort study in the United Kingdom. Participants: We included 110 573 participants from the UK Biobank with intraocular pressure (IOP) measurements available. Their mean age was 57 years (range, 40-69 years); 54% were women, and 90% were white. Methods: Participants had 1 IOP measurement made on each eye using the Ocular Response Analyzer noncontact tonometer. Linear regression models were used to assess the associations of IOP with physical and demographic factors. Main Outcome Measures: The IOPg and IOPcc. Results: The mean IOPg was 15.72 mmHg (95% confidence interval [CI], 15.70-15.74 mmHg), and the mean IOPcc was 15.95 mmHg (15.92-15.97 mmHg). After adjusting for covariates, IOPg and IOPcc were both significantly associated with older age, male sex, higher systolic blood pressure (SBP), faster heart rate, greater myopia, self-reported glaucoma, and colder season (all P < 0.001). The strongest determinants of both IOPg and IOPcc were SBP (partial R-2: IOPg 2.30%, IOPcc 2.26%), followed by refractive error (IOPg 0.60%, IOPcc 1.04%). The following variables had different directions of association with IOPg and IOPcc: height (-0.77 mmHg/m IOPg; 1.03 mmHg/m IOPcc), smoking (0.19 mmHg IOPg, -0.35 mmHg IOPcc), self-reported diabetes (0.41 mmHg IOPg, -0.05 mmHg IOPcc), and black ethnicity (-0.80 mmHg IOPg, 0.77 mmHg IOPcc). This suggests that height, smoking, diabetes, and ethnicity are related to corneal biomechanical properties. The increase in both IOPg and IOPcc with age was greatest among those of mixed ethnicities, followed by blacks and whites. The same set of covariates explained 7.4% of the variability of IOPcc but only 5.3% of the variability of IOPg. Conclusions: This analysis of associations with IOP in a large cohort demonstrated that some variables clearly have different associations with IOPg and IOPcc, and that these 2 measurements may reflect different biological characteristics. (C) 2016 by the American Academy of Ophthalmology.

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