Ambient Air Pollution and the Risk of Central Retinal Artery Occlusion

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• 作者：Hui-Chen Cheng ; MD¹ ; ² ; Ren-Hao Pan ; PhD³ ; ⁴ ; ^&lowast ; ; Huan-Jui Yeh ; MD⁵ ; ⁶ ; ^&lowast ; ; K. Robert Lai ; PhD³ ; ⁴ ; May-Yung Yen ; MD¹ ; ² ; Chien-Lung Chan ; PhD³ ; ⁷ ; ^&lowast ; ; An-Guor Wang ; MD ; PhD¹ ; ² ; ^&lowast ; ; ^{agwang@vghtpe.gov.tw" class="auth_mail" title="E-mail the corresponding author}
• 关键词：CI ; confidence interval ; CRAO ; central retinal artery occlusion ; DM ; diabetes mellitus ; HTN ; hypertension ; NHI ; National Health Insurance ; NHIRD ; National Health Insurance Research Database ; NO2 ; nitrogen dioxide ; OR ; odds ratio ; O3 ; ozone ; PM2.5 ; particulate matter &le ; 2.5 μm in diameter ; PM10 ; particulate matter &le ; 10 μm in diameter ; SO2 ; sulfur dioxide
• 刊名：Ophthalmology
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：123
• 期：12
• 页码：2603-2609
• 全文大小：818 K

文摘

To investigate whether daily changes in ambient air pollution were associated with an increased risk of central retinal artery occlusion (CRAO).

Design

Retrospective population-based cohort study.

Participants

We identified patients newly diagnosed with CRAO between 2001 and 2013 in a representative database of 1 000 000 patients that were randomly selected from all registered beneficiaries of the National Health Insurance program in Taiwan. We identified air pollutant monitoring stations located near these patients' residences in different administrative areas in Taiwan to determine the recorded concentrations of particulate matter ≤2.5 μm (PM_2.5), particulate matter ≤10 μm (PM₁₀), nitrogen dioxide (NO₂), sulfur dioxide (SO₂), and ozone (O₃). Patients without corresponding monitoring stations were excluded.

Methods

We used a time-stratified case-crossover study design and conditional logistic regression analysis to assess associations between the risk of CRAO and the air pollutant levels in the days preceding each event.

Main Outcome Measures

Odds ratios (ORs) and 95% confidence intervals (CIs).

Results

We enrolled 96 patients with CRAO in this study. The mean age was 65.6 years (standard deviation, 12.7 years) and 67.7% of patients were male. The risk of CRAO onset was significantly increased (OR, 1.09; 95% CI, 1.01–1.17; P = 0.03) during a 5-day period following a 1 part per billion increase in NO₂ levels. After multipollutant adjustment, the increase in risk was most prominent after 4 days (OR, 1.40; 95% CI, 1.05–1.87; P = 0.02) to 5 days (OR, 2.16; 95% CI, 1.10–4.23; P = 0.03) of elevated NO₂ levels in diabetic patients. The risk of CRAO onset also significantly increased in patients with hypertension and in patients ≥65 years old, after 1 day of elevated SO₂ levels (OR, 1.88; 95% CI, 1.07–3.29; P = 0.03 and OR, 1.90; 95% CI, 1.13–3.21; P = 0.02, respectively). The transient concentration of the other air pollutants, including PM_2.5, PM₁₀, and O₃, did not significantly affect the occurrence of CRAO in this study.

Conclusions

These results demonstrated a positive association between air pollution and CRAO onset, particularly in patients with diabetes or hypertension and those older than 65 years.