Fig. 1The age-standardized prevalence of diabetes in adults aged ≥30 years from the Korean National Health and Nutrition Examination Survey 2001 to 2014. Age standardization was done using the Korean population in the year 2010. Cases of diabetes mellitus were defined as subjects who were users of antidiabetic medication, including insulin, at the point of the survey or had 8-hour fasting plasma glucose levels ≥126 mg/dL. (A) The overall prevalence of diabetes mellitus in adults aged ≥30 years was shown according to gender. The prevalence in men and women was presented by a circle and square with a standardized error bar, respectively. (B) The prevalence of diabetes mellitus in adults aged 30 to 59 years and ≥60 years was presented with black and gray bars, respectively.
Fig. 2The age-standardized prevalence of diabetes in adults aged (A) ≥30 years and (B) 30 to 59 years from the Korean National Health and Nutrition Examination Survey 2010 to 2014 using different diagnostic criteria. Cases of diabetes mellitus were defined as subjects who were users of antidiabetic medication, including insulin, at the point of the survey or had 8-hour fasting plasma glucose levels ≥126 mg/dL (criteria I, solid line). After adopting an glycosylated hemoglobin ≥6.5% as one of diagnostic criteria of diabetes (criteria II, dashed line), the prevalence of diabetes was increased 2.2% to 2.4%.
Fig. 3The incidence of type 2 diabetes mellitus in the Korean population by age group from the National Health Insurance database. PY, person-year.
Fig. 4The level of (A) insulin secretion capacity and (B) insulin resistance according to the age of patients with recent-onset diabetes from the Korean National Health and Nutrition Examination Survey 2008 to 2010. Recent-onset diabetes patients were defined as those who have had diabetes for <5 years. HOMA-β, the homeostasis model assessment of β-cell function; HOMA-IR, the homeostasis model assessment of insulin resistance; DM, diabetes mellitus.
Fig. 5The prevalence of sarcopenia (class I+class II) in subjects with recent-onset diabetes and without diabetes. Sarcopenia was classified as class I or class II, defined as appendicular skeletal muscle mass/weight 1 to 2 or >2 standard deviations, respectively, below the gender-specific mean for healthy young adults. The entire prevalence of sarcopenia in each age group was separated by gray and black bars which represent the prevalence of sarcopenia class I and II, respectively. DM, diabetes mellitus.