Table 2

Standardized prevalence of diagnosed diabetes, undiagnosed diabetes (A1C ≥6.5%), total diabetes (diagnosed and undiagnosed combined), percent of total diabetes that is undiagnosed, and at high risk of diabetes (A1C ≥6.0 to <6.5%), by age, sex, and race/ethnicity: NHANES 1988–1994, 1999–2002, 2003–2006

1988–19941999–20022003–2006
n15,8918,9739,025
Diagnosed diabetes
    Combined age groups (years)
        ≥205.3 (4.8–5.8)6.6 (5.9–7.3)7.6 (6.9–8.3)
        ≥6512.5 (11.0–13.9)14.9 (13.2–16.6)17.7 (15.6–19.8)
    Age-specific groups (years)
        20–391.1 (0.6–1.6)1.6 (1.0–2.3)1.9 (1.4–2.4)
        40–595.5 (4.6–6.4)6.8 (5.7–7.9)8.1 (6.9–9.4)
        60–7411.9 (10.3–13.5)15.5 (13.9–17.2)17.7 (15.7–19.6)
        ≥7513.7 (11.8–15.6)13.6 (10.6–16.6)15.1 (12.8–17.3)
    Sex (age ≥20 years)
        Men5.3 (4.7–5.8)7.2 (6.2–8.2)7.6 (6.6–8.6)
        Women5.3 (4.6–6.1)6.1 (5.3–6.9)7.6 (6.8–8.4)
    Race/ethnicity (age ≥20 years)
        Non-Hispanic white4.8 (4.2–5.5)5.3 (4.6–6.0)6.3 (5.5–7.0)
        Non-Hispanic black8.4 (7.5–9.2)10.9 (9.4–12.3)12.2 (10.8–13.6)
        Mexican American9.4 (8.5–10.4)10.4 (9.4–11.5)12.0 (10.4–13.6)
Undiagnosed diabetes
    Combined age groups (years)
        ≥202.1 (1.8–2.5)1.6 (1.3–2.0)1.8 (1.4–2.2)
        ≥654.4 (3.4–5.4)3.2 (2.4–4.0)3.5 (2.6–4.4)
    Age-specific groups (years)
        20–390.4 (0.2–0.6)0.5 (0.1–0.8)0.6 (0.3–0.9)
        40–592.6 (1.9–3.2)1.8 (1.3–2.3)2.0 (1.3–2.7)
        60–744.3 (3.2–5.5)3.7 (2.7–4.7)3.5 (2.1–4.9)
        ≥755.5 (3.8–7.2)3.2 (1.9–4.4)3.6 (2.4–4.8)
    Sex (age ≥20 years)
        Men2.6 (2.1–3.1)2.0 (1.5–2.5)2.1 (1.5–2.7)
        Women1.8 (1.4–2.1)1.3 (1.0–1.7)1.5 (1.2–1.8)
    Race/ethnicity (age ≥20 years)
        Non-Hispanic white1.6 (1.2–1.9)1.2 (0.9–1.5)1.3 (0.9–1.8)
        Non-Hispanic black5.0 (4.3–5.6)3.1 (2.4–3.8)2.7 (2.2–3.3)
        Mexican American4.0 (3.0–4.9)2.7 (2.0–3.4)3.6 (2.3–4.9)
Total diabetes
    Combined age groups (years)
        ≥207.4 (6.8–8.1)8.2 (7.3–9.1)9.3 (8.6–10.1)
        ≥6516.9 (15.2–18.6)18.1 (16.2–20.1)21.2 (18.8–23.6)
    Age-specific groups (years)
        20–391.5 (1.0–2.0)2.1 (1.3–2.9)2.5 (1.9–3.1)
        40–598.1 (6.8–9.4)8.6 (7.3–10.0)10.1 (8.7–11.5)
        60–7416.2 (14.3–18.1)19.2 (17.1–21.3)21.1 (18.8–23.5)
        ≥7519.2 (16.9–21.6)16.8 (13.6–19.9)18.6 (16.6–20.7)
    Sex (age ≥20 years)
        Men7.8 (7.1–8.6)9.2 (7.9–10.5)9.7 (8.8–10.6)
        Women7.1 (6.2–8.0)7.4 (6.5–8.3)9.1 (8.1–10.1)
    Race/ethnicity (age ≥20 years)
        Non-Hispanic white6.4 (5.6–7.2)6.5 (5.7–7.3)7.6 (6.7–8.5)
        Non-Hispanic black13.3 (12.3–14.4)14.0 (12.6–15.4)14.9 (13.4–16.5)
        Mexican American13.4 (12.2–14.5)13.2 (12.1–14.2)15.6 (14.2–16.9)
Percent of total diabetes that is undiagnosed
    Combined age groups (years)
        ≥2028.9 (23.2–34.6)20.6 (15.1–26.1)21.5 (16.6–26.4)
        ≥6525.6 (20.5–30.7)17.6 (13.8–21.4)16.4 (12.9–19.9)
    Age-specific groups (years)
        20–3928.1 (15.2–40.9)21.8 (9.9–33.7)25.6 (16.2–34.9)
        40–5931.4 (26.1–36.7)20.4 (15.3–25.6)19.4 (13.3–25.5)
        60–7426.7 (20.8–32.7)19.1 (14.6–23.5)16.4 (10.8–22.0)
        ≥7527.6 (21.1–34.2)19.1 (11.6–26.6)19.2 (12.8–25.7)
    Sex (age ≥20 years)
        Men30.4 (22.7–38.1)22.6 (13.1–32.2)25.4 (16.4–34.3)
        Women27.8 (20.1–35.5)18.7 (11.5–26.0)17.8 (12.4–23.1)
    Race/ethnicity (age ≥20 years)
        Non-Hispanic white19.5 (11.7–27.3)16.9 (10.1–23.8)17.1 (6.5–27.6)
        Non-Hispanic black41.6 (35.2–47.9)26.7 (13.5–40.0)15.7 (8.7–22.7)
        Mexican American44.3 (38.1–50.6)15.2 (11.1–19.3)34.6 (23.0–46.1)
At high risk for diabetes
    Combined age groups (years)
        ≥204.9 (4.4–5.5)3.2 (2.6–3.7)3.4 (3.0–3.8)
        ≥6510.8 (9.7–11.9)6.6 (5.3–7.9)8.1 (6.6–9.6)
    Age-specific groups (years)
        20–391.8 (1.2–2.3)0.8 (0.5–1.2)0.7 (0.4–1.0)
        40–595.2 (4.3–6.0)3.6 (2.7–4.6)3.7 (3.1–4.4)
        60–749.3 (7.9–10.7)6.5 (4.9–8.2)7.1 (5.5–8.8)
        ≥7512.1 (9.7–14.5)6.9 (5.4–8.4)8.7 (7.2–10.2)
    Sex (age ≥20 years)
        Men5.3 (4.4–6.1)3.3 (2.6–3.9)3.6 (3.1–4.1)
        Women4.6 (4.0–5.2)3.1 (2.4–3.8)3.2 (2.6–3.9)
    Race/ethnicity (age ≥20 years)
        Non-Hispanic white3.7 (3.1–4.2)2.5 (1.9–3.0)2.7 (2.3–3.2)
        Non-Hispanic black12.5 (11.3–13.7)5.9 (4.5–7.3)7.2 (6.2–8.2)
        Mexican American5.9 (4.7–7.2)3.8 (2.9–4.7)3.6 (2.5–4.6)
  • Data are % (95% CI). Diagnosed diabetes determined by self-report on interview. Values by age alone and by sex include those of race/ethnic groups not listed separately. Estimates for the total population aged ≥20 years and for race/ethnic groups were age- and sex-standardized, estimates for age-specific groups including those aged ≥65 years were sex-standardized, and estimates for sex groups were age-standardized (all using the 2000 U.S. Census population).