Incidence of primary open angle glaucoma in the Andhra Pradesh Eye Disease Study (APEDS).

Nikhil S Choudhari ; Rohit C Khanna ORCID logo ; Srinivas Marmamula ORCID logo ; Asha Latha Mettla ; Pyda Giridhar ; Seema Banerjee ; Konegari Shekhar ; Subhabrata Chakrabarti ORCID logo ; Gudlavalleti VS Murthy ORCID logo ; Clare Gilbert ORCID logo ; +2 more... Gullapalli N Rao ORCID logo ; Andhra Pradesh Eye Disease Study Group ; (2023) Incidence of primary open angle glaucoma in the Andhra Pradesh Eye Disease Study (APEDS). Eye, 38 (11). pp. 2179-2186. ISSN 0950-222X DOI: 10.1038/s41433-023-02799-z
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BACKGROUND: To report 15-year incidence rate of primary open angle glaucoma (POAG) in the Andhra Pradesh Eye Disease Study (APEDS). METHODS: A population-based longitudinal study was carried out at three rural study sites. Phakic participants aged ≥40 years who participated at baseline (APEDS I) and the mean 15-year follow-up visit (APEDS III) were included. A comprehensive ophthalmic examination was performed on all participants. Mean intraocular pressure (IOP) was average of IOPs of right and left eyes. The definition of glaucoma was based on the International Society of Geographical and Epidemiological Ophthalmology (ISGEO) classification. The main outcome measure was incidence of POAG during the follow-up period in participants without glaucoma or suspicion of glaucoma at baseline. RESULTS: Data from the available and eligible participants from the original cohort (1241/2790; 44.4%) were analysed. The mean age (standard deviation) of participants at baseline was 50.2 (8.1) years; 580 (46.7%) were men. Thirty-six participants developed POAG [bilateral in 17 (47.2%)] over 15 years. The incidence rate of POAG per 100-person years (95% confidence interval) was 2.83 (2.6, 3.08). Compared to baseline, the reduction in mean IOP [median (range) mm Hg] was -0.75 (-7.5, 9) in participants with incident POAG and -2.5 (-14.5, 14.5) in those without. The inter-visit difference in mean IOP was a significant risk factor on logistic regression analysis. CONCLUSION: We report the long-term incidence of POAG in rural India. A longitudinal change in IOP, specifically a less pronounced reduction in IOP with increasing age, was a novel risk factor.


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