Fine Particulate Matter Exposure Levels in Patients with Normal-Tension Glaucoma and Primary Open-Angle Glaucoma: A Population-Based Study from Taiwan
Ci-Wen Luo; Yun-Wei Chiang; Han-Yin Sun; Kun-Lin Yeh; Min-Wei Lee; Wen-Jun Wu; Yu-Hsiang Kuan
Patients with NTG or POAG with more than one outpatient or discharge diagnosis from the ophthalmology department were included in the study. These data were merged with the PM2.5 data from the Air Quality Monitoring Network for analysis. This was a case&ndash:control study, with 1006 participants in the NTG group and 2533 in the POAG group. To investigate fine particulate matter (PM2.5) exposure levels in patients with normal-tension glaucoma (NTG) and primary open-angle glaucoma (POAG), patient data were obtained from Taiwan&rsquo:s Longitudinal Health Insurance Database 2000 for the 2008 to 2013 period. We used a multivariate logic regression model to assess the risk for each participant. The PM2.5 exposure levels were divided into four groups: <:25th percentile (Q1), <:617 &mu:g/mm3: 25th to 50th percentile (Q2), 617 to 1297 &mu:g/mm3: 50th to 75th percentile (Q3), 1297 to 2113 &mu:g/mm3: and >:75th percentile (Q4), >:2113 &mu:g/mm3. The results are expressed in terms of odds ratio (OR) and 95% CI. A multiple logistic regression was used to compare the results of the NTG group with those of the POAG group. Compared with the PM2.5 Q1 level, the OR of the PM2.5 Q2 level was 1.009 (95% CI 0.812&ndash:1.254), the PM2.5 Q3 level was 1.241 (95% CI 1.241&ndash:1.537, p <: 0.05), and the PM2.5 Q4 level was 1.246 (95% CI 1.008&ndash:1.539, p <: 0.05). Our research reveals that compared with POAG, the risk of developing NTG is more closely related with PM2.5 exposure, and PM2.5 has a concentration&ndash:dose effect. It is hoped that in the future, in the clinical judgment of NTG and POAG, the level of PM2.5 in the environment can be taken as a risk factor.
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