Table 3.

Reported sigmoidoscopy in the past 5 years, United States adults aged 50 to 75, NHIS 2000–2008a

 2000 % (95% CI)2003 % (95% CI)2005 % (95% CI)2008 % (95% CI)Percentage point change, 2000–2008
Overall9.4 (8.7–10.2)6.6 (5.9–7.4)4.1 (3.6–4.7)2.4 (1.9–3.0)−7.0
Race/ethnicity
NH white10.1 (9.3–11.0)7.1 (6.3–8.0)4.3 (3.7–5.0)2.4 (1.8–3.1)−7.7
NH black5.7 (4.3–7.5)5.7 (4.0–8.0)3.3 (2.1–5.1)1.4 (0.8–2.5)−4.3
Hispanic5.5 (4.1–7.3)3.6 (2.4–5.5)2.73 (1.8–4.2)2.9 (1.5–5.3)−2.6
NH Asian8.7 (3.9–18.4)6.8 (3.2–13.7)3.3 (1.5–7.0)3.1 (1.6–6.1)−5.6b
Education
>HS12.4 (11.0–13.9)9.1 (8.0–10.3)5.5 (4.6–6.6)2.8 (2.2–3.7)−9.6
HS graduate8.5 (7.2–10.0)5.7 (4.4–7.3)2.5 (1.9–3.3)1.7 (1.2–2.6)−6.8
<HS4.8 (3.8–6.1)2.2 (1.6–3.1)3.6 (2.6–4.9)1.7 (0.7–4.1)−3.1
Time in the United States
Born in United States9.9 (9.1–10.7)7.1 (6.3–7.9)4.3 (3.7–4.9)2.5 (1.9–3.2)−7.4
Immigrant, in United States 10+ years6.2 (4.2–8.9)3.4 (2.4–4.9)3.0 (2.1–4.3)1.8 (0.9–3.4)−4.4
Immigrant, in United States <10 years1.2 (0.3–5.6)1.4 (0.4–5.4)1.9 (0.4–8.6)0.0 (0.0–0.0)−1.2b
Family income (% FPL)
500%+14.5 (12.2–17.2)10.4 (8.5–12.7)6.2 (5.0–7.8)3.6 (2.5–5.2)−10.9
400%–<500%8.5 (6.5–11.0)6.1 (4.3–8.7)3.7 (1.9–7.0)3.2 (1.7–5.8)−5.3
300%–<400%9.5 (7.14–12.6)6.6 (4.8–9.1)3.6 (2.4–5.4)1.6 (0.8–3.2)−7.9
200%–<300%7.9 (6.3–9.8)4.9 (3.6–6.7)2.9 (1.9–4.4)1.5 (0.4–5.3)−6.4
<200%5.8 (4.7–7.0)3.7 (2.7–5.0)2.9 (2.1–3.8)1.6 (0.7–3.5)−4.2
Health insurance—ages 50–64
Private non-HMO9.4 (8.2–10.7)6.9 (5.9–7.9)3.3 (2.7–4.0)2.0 (1.4–2.8)−7.4
Private HMO9.8 (8.3–11.4)7.4 (6.0–9.1)6.9 (5.5–8.7)3.5 (2.4–5.2)−6.3
Public4.8 (3.1–7.4)3.8 (2.6–5.6)3.0 (1.9–4.7)1.4 (0.7–3.0)−3.4
Uninsured2.2 (1.3–3.8)1.7 (1.0–3.0)1.2 (0.5–3.0)1.5 (0.6–3.6)−0.7b
Health insurance—ages 65–75
Medicare + private12.6 (10.4–15.2)7.6 (5.9–9.9)5.0 (3.5–7.1)2.0 (1.1–3.9)−10.6
Medicare HMO10.5 (7.9–13.7)15.7 (11.0–21.8)4.6 (3.1–6.8)5.1 (2.6–9.7)−5.4
Medicare, no supplemental8.4 (5.4–13.0)3.6 (1.8–7.0)2.8 (1.3–5.7)3.7 (1.4–9.5)−4.7
Medicaid, military, and other government9.1 (4.9–16.5)5.2 (3.4–7.8)5.9 (3.6–9.5)2.6 (1.0–6.7)−6.5
Uninsured or Medicare Part A only8.7 (4.5–16.2)20.1 (7.6–43.5)2.4 (0.6–8.9)0.9 (0.1–6.3)−7.8b
Has usual source of care
Yes (excluding ER)10.0 (9.2–10.8)7.0 (6.3–7.8)4.4 (3.8–5.0)2.4 (2.0–3.1)−7.6
No2.4 (1.4–4.3)1.3 (0.6–2.6)0.8 (0.4–1.7)1.1 (0.4–3.0)−1.3b
# Physician visits in past year
2 or more10.5 (9.6–11.4)7.4 (6.6–8.3)4.6 (4.0–5.4)2.4 (1.8–3.1)−8.1
18.6 (6.8–10.9)5.0 (3.7–6.6)3.5 (2.5–5.0)3.1 (1.9–4.9)−5.6
None3.3 (2.3–4.7)2.7 (1.8–4.0)1.1 (0.6–1.9)1.4 (0.8–2.5)−1.9
  • aOverall and subgroup trends are statistically significant at α = 0.05, unless otherwise noted.

  • bTrend for this subgroup is not statistically significant at α = 0.05.