Yi SW, et al. - The associations between fasting glucose and mortality were examined, and the levels associated with lowest mortality by age in diabetes were investigated. Optimal fasting glucose range for survival was higher in adults with than without known prevalent diabetes, except, perhaps, younger adults. In younger adults with diabetes, the authors suggested tight glucose control to lessen premature death. Compared to fasting glucose 170–199 mg/dL, hypoglycemia (<65 mg/dL) was associated with higher mortality, while fasting glucose 65–84 mg/dL had risks comparable with those at levels 140–169 mg/dL in diabetes.