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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
n 15,891 8,973 9,025 
Diagnosed diabetes    
    Combined age groups (years)    
        ≥20 5.3 (4.8–5.8) 6.6 (5.9–7.3) 7.6 (6.9–8.3) 
        ≥65 12.5 (11.0–13.9) 14.9 (13.2–16.6) 17.7 (15.6–19.8) 
    Age-specific groups (years)    
        20–39 1.1 (0.6–1.6) 1.6 (1.0–2.3) 1.9 (1.4–2.4) 
        40–59 5.5 (4.6–6.4) 6.8 (5.7–7.9) 8.1 (6.9–9.4) 
        60–74 11.9 (10.3–13.5) 15.5 (13.9–17.2) 17.7 (15.7–19.6) 
        ≥75 13.7 (11.8–15.6) 13.6 (10.6–16.6) 15.1 (12.8–17.3) 
    Sex (age ≥20 years)    
        Men 5.3 (4.7–5.8) 7.2 (6.2–8.2) 7.6 (6.6–8.6) 
        Women 5.3 (4.6–6.1) 6.1 (5.3–6.9) 7.6 (6.8–8.4) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 4.8 (4.2–5.5) 5.3 (4.6–6.0) 6.3 (5.5–7.0) 
        Non-Hispanic black 8.4 (7.5–9.2) 10.9 (9.4–12.3) 12.2 (10.8–13.6) 
        Mexican American 9.4 (8.5–10.4) 10.4 (9.4–11.5) 12.0 (10.4–13.6) 
Undiagnosed diabetes    
    Combined age groups (years)    
        ≥20 2.1 (1.8–2.5) 1.6 (1.3–2.0) 1.8 (1.4–2.2) 
        ≥65 4.4 (3.4–5.4) 3.2 (2.4–4.0) 3.5 (2.6–4.4) 
    Age-specific groups (years)    
        20–39 0.4 (0.2–0.6) 0.5 (0.1–0.8) 0.6 (0.3–0.9) 
        40–59 2.6 (1.9–3.2) 1.8 (1.3–2.3) 2.0 (1.3–2.7) 
        60–74 4.3 (3.2–5.5) 3.7 (2.7–4.7) 3.5 (2.1–4.9) 
        ≥75 5.5 (3.8–7.2) 3.2 (1.9–4.4) 3.6 (2.4–4.8) 
    Sex (age ≥20 years)    
        Men 2.6 (2.1–3.1) 2.0 (1.5–2.5) 2.1 (1.5–2.7) 
        Women 1.8 (1.4–2.1) 1.3 (1.0–1.7) 1.5 (1.2–1.8) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 1.6 (1.2–1.9) 1.2 (0.9–1.5) 1.3 (0.9–1.8) 
        Non-Hispanic black 5.0 (4.3–5.6) 3.1 (2.4–3.8) 2.7 (2.2–3.3) 
        Mexican American 4.0 (3.0–4.9) 2.7 (2.0–3.4) 3.6 (2.3–4.9) 
Total diabetes    
    Combined age groups (years)    
        ≥20 7.4 (6.8–8.1) 8.2 (7.3–9.1) 9.3 (8.6–10.1) 
        ≥65 16.9 (15.2–18.6) 18.1 (16.2–20.1) 21.2 (18.8–23.6) 
    Age-specific groups (years)    
        20–39 1.5 (1.0–2.0) 2.1 (1.3–2.9) 2.5 (1.9–3.1) 
        40–59 8.1 (6.8–9.4) 8.6 (7.3–10.0) 10.1 (8.7–11.5) 
        60–74 16.2 (14.3–18.1) 19.2 (17.1–21.3) 21.1 (18.8–23.5) 
        ≥75 19.2 (16.9–21.6) 16.8 (13.6–19.9) 18.6 (16.6–20.7) 
    Sex (age ≥20 years)    
        Men 7.8 (7.1–8.6) 9.2 (7.9–10.5) 9.7 (8.8–10.6) 
        Women 7.1 (6.2–8.0) 7.4 (6.5–8.3) 9.1 (8.1–10.1) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 6.4 (5.6–7.2) 6.5 (5.7–7.3) 7.6 (6.7–8.5) 
        Non-Hispanic black 13.3 (12.3–14.4) 14.0 (12.6–15.4) 14.9 (13.4–16.5) 
        Mexican American 13.4 (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)    
        ≥20 28.9 (23.2–34.6) 20.6 (15.1–26.1) 21.5 (16.6–26.4) 
        ≥65 25.6 (20.5–30.7) 17.6 (13.8–21.4) 16.4 (12.9–19.9) 
    Age-specific groups (years)    
        20–39 28.1 (15.2–40.9) 21.8 (9.9–33.7) 25.6 (16.2–34.9) 
        40–59 31.4 (26.1–36.7) 20.4 (15.3–25.6) 19.4 (13.3–25.5) 
        60–74 26.7 (20.8–32.7) 19.1 (14.6–23.5) 16.4 (10.8–22.0) 
        ≥75 27.6 (21.1–34.2) 19.1 (11.6–26.6) 19.2 (12.8–25.7) 
    Sex (age ≥20 years)    
        Men 30.4 (22.7–38.1) 22.6 (13.1–32.2) 25.4 (16.4–34.3) 
        Women 27.8 (20.1–35.5) 18.7 (11.5–26.0) 17.8 (12.4–23.1) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 19.5 (11.7–27.3) 16.9 (10.1–23.8) 17.1 (6.5–27.6) 
        Non-Hispanic black 41.6 (35.2–47.9) 26.7 (13.5–40.0) 15.7 (8.7–22.7) 
        Mexican American 44.3 (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)    
        ≥20 4.9 (4.4–5.5) 3.2 (2.6–3.7) 3.4 (3.0–3.8) 
        ≥65 10.8 (9.7–11.9) 6.6 (5.3–7.9) 8.1 (6.6–9.6) 
    Age-specific groups (years)    
        20–39 1.8 (1.2–2.3) 0.8 (0.5–1.2) 0.7 (0.4–1.0) 
        40–59 5.2 (4.3–6.0) 3.6 (2.7–4.6) 3.7 (3.1–4.4) 
        60–74 9.3 (7.9–10.7) 6.5 (4.9–8.2) 7.1 (5.5–8.8) 
        ≥75 12.1 (9.7–14.5) 6.9 (5.4–8.4) 8.7 (7.2–10.2) 
    Sex (age ≥20 years)    
        Men 5.3 (4.4–6.1) 3.3 (2.6–3.9) 3.6 (3.1–4.1) 
        Women 4.6 (4.0–5.2) 3.1 (2.4–3.8) 3.2 (2.6–3.9) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 3.7 (3.1–4.2) 2.5 (1.9–3.0) 2.7 (2.3–3.2) 
        Non-Hispanic black 12.5 (11.3–13.7) 5.9 (4.5–7.3) 7.2 (6.2–8.2) 
        Mexican American 5.9 (4.7–7.2) 3.8 (2.9–4.7) 3.6 (2.5–4.6) 
1988–19941999–20022003–2006
n 15,891 8,973 9,025 
Diagnosed diabetes    
    Combined age groups (years)    
        ≥20 5.3 (4.8–5.8) 6.6 (5.9–7.3) 7.6 (6.9–8.3) 
        ≥65 12.5 (11.0–13.9) 14.9 (13.2–16.6) 17.7 (15.6–19.8) 
    Age-specific groups (years)    
        20–39 1.1 (0.6–1.6) 1.6 (1.0–2.3) 1.9 (1.4–2.4) 
        40–59 5.5 (4.6–6.4) 6.8 (5.7–7.9) 8.1 (6.9–9.4) 
        60–74 11.9 (10.3–13.5) 15.5 (13.9–17.2) 17.7 (15.7–19.6) 
        ≥75 13.7 (11.8–15.6) 13.6 (10.6–16.6) 15.1 (12.8–17.3) 
    Sex (age ≥20 years)    
        Men 5.3 (4.7–5.8) 7.2 (6.2–8.2) 7.6 (6.6–8.6) 
        Women 5.3 (4.6–6.1) 6.1 (5.3–6.9) 7.6 (6.8–8.4) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 4.8 (4.2–5.5) 5.3 (4.6–6.0) 6.3 (5.5–7.0) 
        Non-Hispanic black 8.4 (7.5–9.2) 10.9 (9.4–12.3) 12.2 (10.8–13.6) 
        Mexican American 9.4 (8.5–10.4) 10.4 (9.4–11.5) 12.0 (10.4–13.6) 
Undiagnosed diabetes    
    Combined age groups (years)    
        ≥20 2.1 (1.8–2.5) 1.6 (1.3–2.0) 1.8 (1.4–2.2) 
        ≥65 4.4 (3.4–5.4) 3.2 (2.4–4.0) 3.5 (2.6–4.4) 
    Age-specific groups (years)    
        20–39 0.4 (0.2–0.6) 0.5 (0.1–0.8) 0.6 (0.3–0.9) 
        40–59 2.6 (1.9–3.2) 1.8 (1.3–2.3) 2.0 (1.3–2.7) 
        60–74 4.3 (3.2–5.5) 3.7 (2.7–4.7) 3.5 (2.1–4.9) 
        ≥75 5.5 (3.8–7.2) 3.2 (1.9–4.4) 3.6 (2.4–4.8) 
    Sex (age ≥20 years)    
        Men 2.6 (2.1–3.1) 2.0 (1.5–2.5) 2.1 (1.5–2.7) 
        Women 1.8 (1.4–2.1) 1.3 (1.0–1.7) 1.5 (1.2–1.8) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 1.6 (1.2–1.9) 1.2 (0.9–1.5) 1.3 (0.9–1.8) 
        Non-Hispanic black 5.0 (4.3–5.6) 3.1 (2.4–3.8) 2.7 (2.2–3.3) 
        Mexican American 4.0 (3.0–4.9) 2.7 (2.0–3.4) 3.6 (2.3–4.9) 
Total diabetes    
    Combined age groups (years)    
        ≥20 7.4 (6.8–8.1) 8.2 (7.3–9.1) 9.3 (8.6–10.1) 
        ≥65 16.9 (15.2–18.6) 18.1 (16.2–20.1) 21.2 (18.8–23.6) 
    Age-specific groups (years)    
        20–39 1.5 (1.0–2.0) 2.1 (1.3–2.9) 2.5 (1.9–3.1) 
        40–59 8.1 (6.8–9.4) 8.6 (7.3–10.0) 10.1 (8.7–11.5) 
        60–74 16.2 (14.3–18.1) 19.2 (17.1–21.3) 21.1 (18.8–23.5) 
        ≥75 19.2 (16.9–21.6) 16.8 (13.6–19.9) 18.6 (16.6–20.7) 
    Sex (age ≥20 years)    
        Men 7.8 (7.1–8.6) 9.2 (7.9–10.5) 9.7 (8.8–10.6) 
        Women 7.1 (6.2–8.0) 7.4 (6.5–8.3) 9.1 (8.1–10.1) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 6.4 (5.6–7.2) 6.5 (5.7–7.3) 7.6 (6.7–8.5) 
        Non-Hispanic black 13.3 (12.3–14.4) 14.0 (12.6–15.4) 14.9 (13.4–16.5) 
        Mexican American 13.4 (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)    
        ≥20 28.9 (23.2–34.6) 20.6 (15.1–26.1) 21.5 (16.6–26.4) 
        ≥65 25.6 (20.5–30.7) 17.6 (13.8–21.4) 16.4 (12.9–19.9) 
    Age-specific groups (years)    
        20–39 28.1 (15.2–40.9) 21.8 (9.9–33.7) 25.6 (16.2–34.9) 
        40–59 31.4 (26.1–36.7) 20.4 (15.3–25.6) 19.4 (13.3–25.5) 
        60–74 26.7 (20.8–32.7) 19.1 (14.6–23.5) 16.4 (10.8–22.0) 
        ≥75 27.6 (21.1–34.2) 19.1 (11.6–26.6) 19.2 (12.8–25.7) 
    Sex (age ≥20 years)    
        Men 30.4 (22.7–38.1) 22.6 (13.1–32.2) 25.4 (16.4–34.3) 
        Women 27.8 (20.1–35.5) 18.7 (11.5–26.0) 17.8 (12.4–23.1) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 19.5 (11.7–27.3) 16.9 (10.1–23.8) 17.1 (6.5–27.6) 
        Non-Hispanic black 41.6 (35.2–47.9) 26.7 (13.5–40.0) 15.7 (8.7–22.7) 
        Mexican American 44.3 (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)    
        ≥20 4.9 (4.4–5.5) 3.2 (2.6–3.7) 3.4 (3.0–3.8) 
        ≥65 10.8 (9.7–11.9) 6.6 (5.3–7.9) 8.1 (6.6–9.6) 
    Age-specific groups (years)    
        20–39 1.8 (1.2–2.3) 0.8 (0.5–1.2) 0.7 (0.4–1.0) 
        40–59 5.2 (4.3–6.0) 3.6 (2.7–4.6) 3.7 (3.1–4.4) 
        60–74 9.3 (7.9–10.7) 6.5 (4.9–8.2) 7.1 (5.5–8.8) 
        ≥75 12.1 (9.7–14.5) 6.9 (5.4–8.4) 8.7 (7.2–10.2) 
    Sex (age ≥20 years)    
        Men 5.3 (4.4–6.1) 3.3 (2.6–3.9) 3.6 (3.1–4.1) 
        Women 4.6 (4.0–5.2) 3.1 (2.4–3.8) 3.2 (2.6–3.9) 
    Race/ethnicity (age ≥20 years)    
        Non-Hispanic white 3.7 (3.1–4.2) 2.5 (1.9–3.0) 2.7 (2.3–3.2) 
        Non-Hispanic black 12.5 (11.3–13.7) 5.9 (4.5–7.3) 7.2 (6.2–8.2) 
        Mexican American 5.9 (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).

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