饮食中的碳水化合物与老年失明有关

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饮食中的碳水化合物与老年失明有关

Dietary carbs linked to vision loss
Mon Jul 30, 2007 8:31PM EDT
NEW YORK (Reuters Health) - The carbohydrates present in a diet can influence the risk of age-related macular degeneration (AMD), the most common cause of vision loss in older adults, according to a report in the American Journal of Clinical Nutrition.

\"AMD appears to share several carbohydrate-related mechanisms and risk factors with diabetes-related diseases, including (eye) and cardiovascular disease,\" write Dr. Allen Taylor, of Tufts University, Boston, and colleagues. \"However, to date, only one small study has addressed this issue.\"

To investigate further, the researchers conducted a study of 4,099 participants, aged 55 to 80 years, in the Age-Related Eye Disease Study.

The team classified a total of 8,125 eyes into one of five AMD groups based on the severity of the disease and other factors.

Regular consumption of a diet with a high-glycemic index - a diet containing carbs that quickly raise blood sugar levels -- significantly increased the risk of AMD relative to regular consumption of a diet with a low-glycemic index.

The researchers calculate that 20 percent of AMD cases could have been prevented if subjects had consumed diets with a low-glycemic index.

SOURCE: American Journal of Clinical Nutrition, July 2007.
纽约（路透社健康专栏）2007年7月30日报道-美国临床营养学杂志一项研究表明：老年黄斑病变(AMD)是老年人致盲的最常见原因，而饮食中的碳水化合物会影响患AMD的风险。
波士顿塔夫斯大学的Allen Taylor博士及其同事表示AMD和糖尿病相关疾病如眼病，心血管疾病一样，它们的发病机制和危险因素均与碳水化合物相关。然而迄今为止，仅一小部分研究涉及这个问题。
为了进一步研究AMD，研究者们调查了从55岁到80岁的4，099位病人。
根据AMD的严重程度和其他因素，研究者们将8，125只眼睛分为5类。
经常高糖饮食的人，即饮食中的碳水化合物使血糖水平很快升高的人与低糖饮食的人相比，患AMD的机率将显著增加。
研究者们认为20%的AMD患者可以通过低糖饮食而避免患老年性黄斑病变。