Ann Intern Med.: April 15, 2014
Background: Trends in the prevalence and control of diabetes defined by hemoglobin A1c (HbA1c) levels are important for health care policy and planning.
Objective: To update trends in the prevalence of diabetes, prediabetes, and glycemic control.
Setting: NHANES (National Health and Nutrition Examination Survey) in 1988–1994 and 1999–2010.
Participants: Adults aged 20 years or older.
Measurements: We used calibrated HbA1c levels to define undiagnosed diabetes (≥6.5%); prediabetes (5.7% to 6.4%); and, among persons with diagnosed diabetes, glycemic control (<7.0% or <8.0%). Trends in HbA1c categories were compared with fasting glucose levels (≥7.0 mmol/L [≥126 mg/dL] and 5.6 to 6.9 mmol/L [100 to 125 mg/dL]). Read More