Dietary carbohydrate and the progression of age-related macular degeneration: a prospective study from the Age-Related Eye Disease Study  

Oleh:

Chung-Jung Chiu ; Milton, Roy C. ; Klein, Ronald ; Gensler, Gary ; Taylor, Allen

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 86 no. 04 (Oct. 2007), page 1210.
Topik: Retina ; nutrition ; carbohydrate ; diabetes ; sugar ; glycation ; inflammation ; aging ; stress ; epidemiology

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2007.04 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Background: Cross-sectional studies indicate that diets that provide a higher dietary glycemic index (dGI) are associated with a greater risk of age-related macular degeneration (AMD). No prospective studies have addressed this issue. Objective: The objective was to prospectively evaluate the effect of baseline dGI on the progression of AMD. Design: dGI was calculated as the weighted average of GIs from foods and was evaluated as being above or below the sex median (women: 77.9; men: 79.3) for 3977 participants aged 55–80 y (58% women) in the Age-Related Eye Disease Study. The 7232 eligible eyes without advanced AMD were classified into 1 of 3 AMD categories: group 1 (nonextensive small drusen), group 2 (intermediate drusen, extensive small drusen, or pigmentary abnormalities), or group 3 (large drusen or extensive intermediate drusen). With the use of multifailure Cox proportional-hazards regression, we modeled the time to the maximal progression to evaluate the relation between dGI and the risk of AMD. Results: Overall, the multivariate-adjusted risk of progression over 8 y of follow-up (: 5.4 y) was significantly higher (risk ratio: 1.10; 95% CI: 1.00, 1.20; P = 0.047) in the high-dGI group than in the low-dGI group. The risk of progression for groups 1, 2, and 3 eyes was 5%, 8%, and 17% greater, respectively (P for trend < 0.001). The latter gives an estimate that 7.8% of new advanced AMD cases would be prevented in 5 y if people consumed the low-dGI diet. Conclusion: Persons at risk of AMD progression, especially those at high risk of advanced AMD, may benefit from consuming a smaller amount of refined carbohydrates.

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