TABLE 7. Comparison of autism spectrum disorder prevalence among sites with comparable surveillance areas in 2010 and 2012, by record source type, sex, and race/ethnicity, Autism and Developmental Disabilities Monitoring Network, eight sites, United States.
| Characteristic | 2010 |
2012 |
2012-to-2010 prevalence ratio (95% CI) |
|---|---|---|---|
| Prevalence (95% CI) | Prevalence (95% CI) | ||
|
Record source
| |||
| E+H areas* |
17.5 (16.9–18.2) |
17.6 (17.0–18.3) |
1.00 (0.95–1.05) |
| HO areas† |
10.8 (10.1–11.4) |
11.0 (10.3–11.7) |
1.02 (0.94–1.11) |
| E+H-to-HO prevalence ratio |
1.6 (1.5–1.7) |
1.6 (1.5–1.7) |
—§ |
|
Site
| |||
| Arizona |
15.7 (14.4–17.1) |
15.1 (13.9–16.5) |
0.97 (0.85–1.09) |
| Colorado |
9.9 (9.0–10.9) |
10.8 (9.8–11.8) |
1.09 (0.95–1.25) |
| Georgia |
15.5 (14.5–16.7) |
15.5 (14.5–16.6) |
1.00 (0.90–1.10) |
| Missouri |
14.2 (12.8–15.7) |
11.6 (10.4–13.0) |
0.82 (0.70–0.96) |
| New Jersey |
21.9 (20.4–23.6) |
24.6 (23.0–26.4) |
1.11 (1.01–1.23) |
| North Carolina |
17.3 (16.1–18.7) |
16.8 (15.5–18.1) |
0.97 (0.87–1.08) |
| Utah |
18.6 (17.0–20.4) |
17.3 (15.7–19.0) |
0.93 (0.81–1.06) |
| Wisconsin |
9.3 (8.3–10.3) |
10.8 (9.8–11.9) |
1.17 (1.01–1.35) |
|
Sex
| |||
| Male |
24.4 (23.6–25.2) |
24.6 (23.8–25.4) |
1.01 (0.96–1.05) |
| Female |
5.4 (5.0–5.8) |
5.5 (5.1–5.9) |
1.02 (0.92–1.13) |
| Male-to-female prevalence ratio |
4.5 (4.2–4.9) |
4.5 (4.1–4.8) |
— |
|
Race/Ethnicity
| |||
| White, non-Hispanic |
16.2 (15.5–16.8) |
16.5 (15.8–17.2) |
1.02 (0.96–1.08) |
| Black, non-Hispanic |
12.9 (12.0–13.9) |
13.9 (12.9–14.9) |
1.08 (0.97–1.19) |
| Hispanic |
11.2 (10.4–12.1) |
10.5 (9.7–11.3) |
0.93 (0.84–1.04) |
| White-to-black prevalence ratio |
1.3 (1.2–1.4) |
1.2 (1.1–1.3) |
— |
| White-to-Hispanic prevalence ratio |
1.4 (1.3–1.6) |
1.6 (1.4–1.7) |
— |
| Black-to-Hispanic prevalence ratio |
1.2 (1.0–1.3) |
1.3 (1.2–1.5) |
— |
| Total | 15.1 (14.6–15.5) | 15.2 (14.8–15.7) | 1.01 (0.97–1.05) |
Abbreviations: CI = confidence interval; E+H = education and health records review; HO = health records only review.
*Sites reviewing education and health records: Arizona, Georgia, New Jersey, North Carolina, and Utah.
†Sites reviewing health records only: Colorado, Missouri, and Wisconsin.
§Ratios of prevalence ratios were not calculated.