研究目的
To assess diagnostic accuracy of spectral-domain optical coherence tomography (SD-OCT) to discriminate glaucoma and control subjects in an elderly population.
研究成果
SD-OCT RNFL parameters had good diagnostic performances to discriminate glaucoma and control subjects in a general and unselected population of elderly people. By providing a posttest probability, SD-OCT may be a valuable tool in a screening program to improve the detection of glaucoma in such populations, particularly when all RNFL parameters are combined.
研究不足
The influence of corneal curvature, longer axial length, high myopia, or peripapillary atrophy on peripapillary RNFL thickness measurements can bias diagnostic performances of SD-OCT to detect glaucoma. Additionally, due to a high prevalence of macular abnormalities in the cohort, performances of macular parameters could not be analyzed.
1:Experimental Design and Method Selection:
The study was a population-based study involving elderly subjects aged 74 years or older. It included a complete eye examination with optic disc color photography and SD-OCT examination of the macula and the optic nerve head. Glaucoma diagnosis was made using retinophotography of the optic nerve head and International Society for Epidemiologic and Geographical Ophthalmology criteria.
2:Sample Selection and Data Sources:
A total of 624 subjects were evaluated, with 532 having complete data for analysis.
3:List of Experimental Equipment and Materials:
Spectralis SD-OCT (Heidelberg Engineering), noncontact tonometer (KT 800; Kowa, Tokyo, Japan), nonmydriatic retinophotograph (TRC NW6S; Topcon, Inc., Tokyo, Japan), and Pachpen (Accutome, Inc., Malverne, PA, USA).
4:Experimental Procedures and Operational Workflow:
Subjects underwent an ophthalmologic examination including best-corrected visual acuity measurement, intraocular pressure measurement, macular and optic disc color photography, SD-OCT examination, break-up time test, and central corneal thickness measurement.
5:Data Analysis Methods:
Statistical analyses were performed using SAS, version 9.2 (SAS Institute, Inc., Cary, NC, USA).
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