Association between Metformin and a Lower Risk of Age-Related Macular Degeneration in Patients with Type 2 Diabetes

Purpose. This population-based, retrospective cohort study was to investigate whether metformin is associated with a lower risk of subsequent age-related macular degeneration (AMD) in patients with type 2 diabetes. Methods. Using the Taiwan National Health Insurance Research Database from 2001 to 20...

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Bibliographic Details
Published in:Journal of ophthalmology 2019, Vol.2019 (2019), p.1-9
Main Authors: Chou, Pesus, Wei, Li-Chen, Feng, Shih-Chao, Lin, Keng-Hung, Wang, Chun-Yuan, Lai, Yun-Ju, Shen, Ying-Cheng, Chen, Yu-Yen, Liang, Chiao-Ying
Format: Article
Language:English
Subjects:
Antidiabetics
Drug dosages
Health insurance
Macular degeneration
Studies
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Summary:Purpose. This population-based, retrospective cohort study was to investigate whether metformin is associated with a lower risk of subsequent age-related macular degeneration (AMD) in patients with type 2 diabetes. Methods. Using the Taiwan National Health Insurance Research Database from 2001 to 2013, 68205 subjects with type 2 diabetes were enrolled in the study cohort. Among them, 45524 were metformin users and 22681 were nonusers. The metformin and nonmetformin groups were followed until the end of 2013. Cox regression analyses were used to estimate hazard ratios (HRs) for AMD development associated with metformin use. Confounders included for adjustment were age, sex, and comorbidities (hypertension, hyperlipidemia, coronary artery disease, obesity, diabetic retinopathy, chronic kidney disease, and insulin treatment). Furthermore, propensity score (PS) matching method was used to choose the matched sample, and PS-adjusted Cox regression was performed. Finally, how HRs changed according to metformin treatment duration and dose was also evaluated in the metformin group. Results. After adjusting for confounders, the metformin group had a significantly lower risk of AMD (adjusted HR = 0.54; 95% confidence interval [CI], 0.50–0.58). In the PS-matched sample, the significance remained (adjusted HR = 0.57; 95% CI, 0.52–0.63). In the metformin group, the adjusted HRs for the second (1.5–4 years) and third (≥4 years) tertiles of metformin treatment duration were 0.52 and 0.14, respectively, compared with the first tertile (
ISSN:2090-004X
2090-0058
DOI:10.1155/2019/1649156