TABLE 2. Prevalence* of autism spectrum disorder among children aged 8 years, overall and by sex — Autism and Developmental Disabilities Monitoring Network, 11 sites, United States, 2020.
| Site | Overall† |
Male prevalence (95% CI) | Female prevalence (95% CI) | Male-to-female prevalence ratio (95% CI)§ | ||
|---|---|---|---|---|---|---|
| No. with ASD | Total population | Prevalence (95% CI) | ||||
| Arizona |
360 |
13,118 |
27.4 (24.8–30.4) |
43.8 (39.2–49.0) |
10.3 (8.1–13.1) |
4.3 (3.3–5.5) |
| Arkansas |
362 |
15,432 |
23.5 (21.2–26.0) |
36.3 (32.4–40.6) |
9.6 (7.6–12.1) |
3.8 (2.9–4.9) |
| California |
710 |
15,828 |
44.9 (41.7–48.2) |
69.4 (64.1–75.1) |
19.1 (16.3–22.4) |
3.6 (3.0–4.3) |
| Georgia |
553 |
21,921 |
25.2 (23.2–27.4) |
40.2 (36.7–44.0) |
9.7 (8.0–11.7) |
4.2 (3.4–5.1) |
| Maryland |
491 |
21,278 |
23.1 (21.1–25.2) |
36.9 (33.5–40.6) |
8.6 (7.0–10.6) |
4.3 (3.4–5.4) |
| Minnesota |
482 |
16,150 |
29.8 (27.3–32.6) |
47.8 (43.4–52.6) |
11.0 (9.0–13.6) |
4.3 (3.4–5.4) |
| Missouri |
601 |
24,561 |
24.5 (22.6–26.5) |
38.7 (35.4–42.2) |
9.3 (7.8–11.2) |
4.1 (3.4–5.1) |
| New Jersey |
544 |
18,940 |
28.7 (26.4–31.2) |
44.5 (40.5–48.7) |
12.2 (10.2–14.7) |
3.6 (3.0–4.5) |
| Tennessee |
713 |
25,588 |
27.9 (25.9–30.0) |
43.9 (40.5–47.5) |
11.1 (9.4–13.1) |
4.0 (3.3–4.8) |
| Utah |
621 |
24,734 |
25.1 (23.2–27.1) |
37.6 (34.4–41.1) |
11.8 (10.0–13.9) |
3.2 (2.6–3.8) |
| Wisconsin |
808 |
28,789 |
28.1 (26.2–30.0) |
42.6 (39.4–45.9) |
13.0 (11.2–15.0) |
3.3 (2.8–3.9) |
| Total | 6,245 | 226,339 | 27.6 (26.9–28.3) | 43.0 (41.9–44.2) | 11.4 (10.7–12.0) | 3.8 (3.6–4.0) |
Abbreviation: ASD = autism spectrum disorder.
* Per 1,000 children aged 8 years.
† All children are included in the total regardless of sex or race and ethnicity.
§ Wilson score 95% CIs exclude 1.0 in all sites, indicating significantly higher prevalence among males than among females; Mantel Haenszel (Woolf) test of homogeneity of prevalence ratios across sites, p value = 0.15, indicating little heterogeneity in prevalence ratios across sites.