Individuals who started a study with A1C readings of more than 5.9% but less than 6.5% had more than eight times the risk of developing diabetes over about four years as those whose readings fell below 5.7%, while risk was about doubled for those who started with A1C readings from 5.7% to 5.9%, according to a study in Diabetes Care. Researchers evaluated data from more than 34,000 people without diabetes who were participating in an employee wellness program, and they found that nearly 13% of those with the highest A1C readings developed diabetes during the study, compared with less than 1% of those with lower readings.
Study quantifies diabetes risk associated with A1C elevation
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