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Diurnal IOP fluctuation: not an independent risk factor for glaucomatous visual field loss in high-risk ocular hypertension

  • Clinical Investigation
  • Published:
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Abstract

Purpose

To establish whether intraocular pressure (IOP) fluctuations contribute to the risk of developing glaucoma in patients with high-risk ocular hypertension.

Methods

Ninety patients included in the Malmö Ocular Hypertension Study were examined every 3 months with office-hours diurnal tension curves and computerised perimetry. Patients were followed up prospectively for 10 years or until glaucomatous visual field loss could be demonstrated. Poststudy data were included in the analyses, extending maximum follow-up to 17 years.

Results

After 17 years, 37 patients had developed glaucomatous visual field defects. When applying univariate Cox regression analyses, mean IOP of all measurements during the prospective part of the study was a significant risk factor for developing glaucoma (95% confidence interval [CI] 1.08–1.39), while IOP fluctuations were almost significant (95% CI 0.98–1.93). When separating effects of mean IOP level and mean IOP fluctuation using Cox multiple regression analysis, only IOP level came out as significant (95% CI 1.09–1.38), and IOP fluctuations did not contribute to the risk (95% CI 0.80–1.60). IOP fluctuation depended linearly on IOP level (p<0.0001), i.e. IOP fluctuation was larger in eyes with higher IOP levels.

Conclusion

IOP fluctuations were not an independent risk factor for the incidence of glaucomatous visual field loss in subjects with ocular hypertension.

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Acknowledgements

This study was supported by grant K2002-74X-10426-10A from the Swedish Research Council, by the Järnhardt Foundation and by funds administered by Malmö University Hospital.

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Authors and Affiliations

  1. Department of Ophthalmology, Malmo University Hospital, Lund University, 20502, Malmo, Sweden

    Boel Bengtsson & Anders Heijl

Authors
  1. Boel Bengtsson
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  2. Anders Heijl
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Correspondence to Boel Bengtsson.

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Bengtsson, B., Heijl, A. Diurnal IOP fluctuation: not an independent risk factor for glaucomatous visual field loss in high-risk ocular hypertension. Graefe's Arch Clin Exp Ophthalmol 243, 513–518 (2005). https://doi.org/10.1007/s00417-004-1103-8

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  • DOI: https://doi.org/10.1007/s00417-004-1103-8

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