Abstract
Serum fructosamine levels can be used to estimate long-term serum glucose values and can be measured in frozen serum. The authors examined whether fructosamine levels were associated with mortality in a cohort of 9,704 white women (> or = 65 years of age) recruited from September 1986 to October 1988 at four clinical centers in the United States. A random sample of women who had died during a mean of 6 years of follow-up (n = 55) was compared with randomly selected controls (n = 276, 54 of whom had died). Fructosamine assays were performed blinded to vital status. Hazard ratios with 95% confidence intervals were adjusted for age, clinical center, smoking, hypertension, and serum albumin and cholesterol levels. Each standard deviation (46 micromol) increase in fructosamine level was associated with a 1.3-fold (95% confidence interval (CI) 1.0-1.6, p = 0.04) increased rate of all-cause mortality, including a 1.5-fold (95% CI 1.0-2.1, p = 0.03) increase in cardiovascular disease mortality. Elevated fructosamine levels (>285 micromol/liter) were associated with a 4.3-fold (95% CI 1.6-12, p = 0.004) increased rate of cardiovascular mortality; in women without a history of diabetes, the hazard ratio was 4.6 (95% CI 1.3-16, p = 0.02). Fructosamine level, or another indicator of glycemia, should be included when the risk of cardiovascular disease among older patients is evaluated.
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