Table 2. Hemoglobin A1c (HbA1c) Testing and Awareness of Test Results and Targets Among Participants Reporting Diabetesa.
| Participants, Weighted % (95% CI) by NHANES Period | |||
|---|---|---|---|
| 2007-2008 (n = 777) |
2011-2012 (n = 708) |
2013-2014 (n = 737) |
|
| With ≥1 HbA1c Test in the Past Yearb | |||
| Overall | 55.10 (49.69-60.50) | 69.56 (64.91-74.20) | 77.78 (75.07-80.48) |
| Age range, y | |||
| 20-44 | 63.68 (53.40-73.95) | 64.64 (55.31-73.96) | 75.17 (56.07-94.26) |
| 45-65 | 53.85 (46.42-61.27) | 73.17 (67.30-79.03) | 79.07 (75.79-82.34) |
| >65 | 53.82 (46.43-61.20) | 66.92 (59.23-74.60) | 77.1 (72.86-81.33) |
| Racec | |||
| White | 62.22 (55.14-69.29) | 75.45 (69.43-81.46) | 83.56 (78.13-88.98) |
| Nonwhite | 42.43 (36.19-48.66) | 61.25 (54.35-68.14) | 68.11 (63.50-72.71) |
| Sex | |||
| Male | 57.89 (51.75-64.02) | 70.69 (64.71-76.66) | 78.1 (74.19-82.00) |
| Female | 52.61 (45.33-59.88) | 68.46 (60.40-76.51) | 77.48 (73.05-81.90) |
| Aware of Past-Year HbA1c Result | |||
| Overall | 52.32 (47.63-57.00) | 64.71 (60.02-69.39) | 74.31 (69.63-78.99) |
| Age range, y | |||
| 20-44 | 64.88 (51.09-78.67) | 73.30 (59.50-87.09) | 72.44 (58.64-86.23) |
| 45-65 | 54.05 (44.73-63.37) | 67.22 (57.90-76.54) | 77.72 (68.40-87.04) |
| >65 | 46.14 (34.73-57.54) | 58.58 (47.17-69.98) | 70.60 (59.19-82.00) |
| Racec | |||
| White | 58.87 (52.26-65.47) | 72.36 (65.75-78.96) | 80.84 (74.24-87.45) |
| Nonwhite | 37.16 (29.25-45.07) | 51.40 (43.49-59.31) | 60.89 (52.98-68.80) |
| Sex | |||
| Male | 59.49 (52.11-66.86) | 66.71 (59.33-74.08) | 74.39 (67.01-81.76) |
| Female | 46.40 (41.03-51.76) | 62.70 (57.34-68.07) | 74.23 (68.87-79.60) |
| Aware of Target HbA1c Level Told by a Physician | |||
| Overall | 74.07 (70.48-77.66) | 83.95 (80.37-87.54) | 89.70 (86.11-93.29) |
| Age range, y | |||
| 20-44 | 86.22 (76.28-96.15) | 86.14 (76.20-96.08) | 86.83 (76.89-96.77) |
| 45-65 | 73.80 (66.97-80.64) | 85.30 (78.46-92.13) | 89.76 (82.92-96.60) |
| >65 | 70.29 (61.94-78.63) | 81.47 (73.12-89.81) | 90.63 (82.28-98.97) |
| Racec | |||
| White | 76.84 (72.16-81.52) | 89.94 (85.26-94.62) | 94.13 (89.45-98.81) |
| Nonwhite | 67.66 (61.04-74.28) | 73.53 (66.91-80.15) | 80.60 (73.98-87.21) |
| Sex | |||
| Male | 74.54 (67.93-81.16) | 89.44 (82.82-96.05) | 87.96 (81.35-94.57) |
| Female | 73.68 (69.39-77.97) | 78.45 (74.16-82.75) | 91.37 (87.07-95.66) |
Abbreviation: NHANES, National Health and Nutrition Examination Survey.
a
Data were not available in the 2009-2010 NHANES survey. Number of participants is unweighted. P value for the trend analysis was less than .001 for all rows except for patients aged 20 to 44 years. For this subgroup the P values were .02 for HbA1c testing, .16 for awareness of HbA1c result, and .81 for awareness of the target HbA1c level. Survey weights for each period were used to calculate the proportions. We used sample interview weights for the analysis related to the values.
b
Self-reported.
c
For the classification of race, see the footnotes in Table 1.