Table 1. Participant Characteristics According to HbA1c-Defined Prediabetes and IFG in Older Adults, the ARIC Study, 2011-2013 (Visit 5)a.
| Characteristic | HbA1c categoryb | FG categoryc | ||
|---|---|---|---|---|
| Normoglycemia (HbA1c <5.7%) | Prediabetes (HbA1c 5.7%-6.4%) | Normoglycemia (FG <100 mg/dL) | Prediabetes (FG 100-125 mg/dL) | |
| No. (%) of participants | 1400 (56) | 1097 (44) | 1035 (41) | 1462 (59) |
| HbA1c | ||||
| Median (range), % | 5.4 (3.4-5.6) | 5.9 (5.7-6.4) | 5.5 (3.4-6.4) | 5.7 (3.4-6.4) |
| <5.7% | 1400 (100) | 0 | 672 (65) | 728 (50) |
| 5.7%-6.4% | 0 | 1097 (100) | 363 (35) | 734 (50) |
| FG | ||||
| Median (range), mg/dL | 100 (65-125) | 104 (76-125) | 94 (65-99) | 107 (100-125) |
| <100 mg/dL | 672 (48) | 363 (33) | 1035 (100) | 0 |
| 100-125 mg/dL | 728 (52) | 734 (67) | 0 | 1462 (100) |
| Age, mean (SD), y | 75.1 (5.0) | 75.5 (5.2) | 75.4 (5.2) | 75.2 (5.1) |
| Sex | ||||
| Male | 594 (42) | 446 (41) | 343 (33) | 697 (48) |
| Female | 806 (58) | 651 (59) | 692 (67) | 765 (52) |
| Race/ethnicity | ||||
| White | 1227 (88) | 838 (76) | 840 (81) | 1225 (84) |
| Black | 173 (12) | 259 (24) | 195 (19) | 237 (16) |
Abbreviations: ARIC, Atherosclerosis Risk in Communities; FG, fasting glucose; HbA1c, glycated hemoglobin; IFG, impaired fasting glucose.
SI conversion factors: to convert HbA1c to proportion of hemoglobin, multiply by 0.01; glucose to millimoles per liter, multiply by 0.0555.
a
Data are presented as number (percentage) of participants unless otherwise indicated.
b
Normoglycemia is defined as an HbA1c level less than 5.7% without total diabetes and prediabetes as an HbA1c level of 5.7% to 6.4% without total diabetes.
c
Normoglycemia is defined as an FG level less than 100 mg/dL without total diabetes and prediabetes as an FG level of 100 to 125 mg/dL without total diabetes.