Table 2.
Crude Prevalence of Glycemic Status for Older-adult Americans, by Age and Survey Period, 1999–2010
| Glycemic or prediabetes status by age group | Men | Women | ||||
|---|---|---|---|---|---|---|
| Prevalence (95% CI) by survey period | Absolute prevalence change | Prevalence (95% CI) by survey period | Absolute prevalence change | |||
| 1999–2004 | 2005–2010 | 1999–2004 | 2005–2010 | |||
| Glycemic status (50–64 years) | ||||||
| Normal | 35.8 (31.6, 40.2) | 29.6 (25.3, 34.3) | −6.2 | 54.5 (50.1, 58.9) | 44.5 (40.8, 48.3) | −10.0*** |
| Diagnosed diabetes | 11.9 (10.4, 13.6) | 12.8 (11.0, 14.8) | 0.9 | 10.2 (8.6, 12.0) | 12.1 (9.8, 14.8) | 1.9 |
| Undiagnosed diabetes | 5.7 (3.9, 8.3) | 6.4 (4.5, 9.0) | 0.7 | 4.0 (2.6, 6.0) | 2.5 (1.5, 4.1) | −1.5 |
| Prediabetesa | 46.6 (41.8, 51.4) | 51.2 (46.3, 56.1) | 4.6 | 31.3 (27.9, 35.1) | 41.0 (36.5, 45.6) | 9.7** |
| Total | 100.0 | 100.0 | 100.0 | 100.0 | ||
| Glycemic status (65–74 years) | ||||||
| Normal | 26.4 (21.9, 31.3) | 22.1 (18.0, 26.8) | −4.3 | 38.2 (31.7, 45.2) | 25.8 (20.7, 31.7) | −12.4** |
| Diagnosed diabetes | 19.6 (16.8, 22.7) | 20.9 (17.5, 24.8) | 1.3 | 17.2 (14.4, 20.5) | 19.3 (16.2, 22.8) | 2.1 |
| Undiagnosed diabetes | 10.1 (7.6, 13.4) | 9.7 (6.4, 14.4) | −0.4 | 5.6 (3.3, 9.3) | 6.5 (3.9, 10.6) | 0.9 |
| Prediabetes | 43.9 (38.1, 49.8) | 47.3 (42.2, 52.4) | 3.4 | 38.9 (33.7, 44.4) | 48.4 (42.8, 54.0) | 9.5** |
| Total | 100.0 | 100.0 | 100.0 | 100.0 | ||
| Glycemic status (≥75 years) | ||||||
| Normal | 29.2 (24.3, 34.6) | 21.9 (17.4, 27.1) | −7.3* | 36.4 (30.6, 42.7) | 26.8 (22.9, 31.2) | −9.6* |
| Diagnosed diabetes | 13.9 (11.4, 16.8) | 17.5 (13.9, 21.7) | 3.6 | 16.8 (13.5, 20.7) | 17.5 (15.3, 20.0) | 0.7 |
| Undiagnosed diabetes | 7.8 (5.2, 11.4) | 10.4 (7.7, 13.9) | 2.6 | 4.3 (2.8, 6.5) | 7.6 (5.4, 10.6) | 3.3 |
| Prediabetes | 49.2 (43.5, 55.0) | 50.2 (45.2, 55.2) | 1.0 | 42.5 (36.8, 48.3) | 48.0 (43.5, 52.5) | 5.5 |
| Total | 100.0 | 100.0 | 100.0 | 100.0 | ||
| HbA1c5.7 by age | ||||||
| 50–64 years | 14.5 (11.6, 17.9) | 25.0 (21.2, 29.2) | 10.5*** | 16.5 (13.9, 19.3) | 27.1 (23.7, 30.9) | 10.6*** |
| 65–74 years | 17.4 (13.3, 22.5) | 27.4 (21.9, 33.8) | 10.0* | 23.2 (19.1, 27.8) | 33.4 (26.8, 40.7) | 10.2* |
| ≥75 years | 24.1 (20.2, 28.5) | 29.2 (24.4, 34.4) | 5.1 | 21.3 (16.7, 26.6) | 35.7 (31.5, 40.1) | 14.4*** |
| IFG by age | ||||||
| 50–64 years | 40.9 (36.4, 45.5) | 43.4 (39.2, 47.8) | 2.5 | 25.8 (22.0, 30.0) | 28.8 (24.6, 33.5) | 3.0 |
| 65–74 years | 37.5 (32.1, 43.2) | 38.2 (33.3, 43.4) | 0.7 | 31.6 (26.5, 37.2) | 31.0 (26.0, 36.5) | −0.6 |
| ≥75 years | 45.2 (38.9, 51.7) | 42.9 (38.0, 48.0) | −2.3 | 35.8 (30.5, 41.4) | 31.8 (26.6, 37.4) | −4.0 |
Note: p-values were calculated from a t-test. Boldface indicates statistical significance (*p<0.05; **p<0.01; ***p<0.001).
a
Prediabetes is defined by HbA1c5.7 and/or IFG.
HbA1c5.7, hemoglobin A1c=5.7%–6.4% (39–47 mmol/mol); IFG, impaired fasting glucose (fasting plasma glucose=100–125 mg/dL).