TABLE 5. Median age (in months) of earliest known autism spectrum disorder diagnosis and number and proportion within each diagnostic subtype — Autism and Developmental Disabilities Monitoring Network, 11 sites, United States, 2014.
| Site | Autistic disorder |
ASD/PDD |
Asperger disorder |
Any specified ASD diagnosis |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median age | No. | (%) | Median age | No. | (%) | Median age | No. | (%) | Median age | No. | (%) | |
| Arizona | 55 | 186 | (76.2) | 61 | 50 | (20.5) | 74 | 8 | (3.3) | 56 | 244 | (69.9) |
| Arkansas | 55 | 269 | (63.0) | 63 | 129 | (30.2) | 75 | 29 | (6.8) | 59 | 427 | (81.8) |
| Colorado | 40 | 192 | (61.7) | 65 | 104 | (33.4) | 61 | 15 | (4.8) | 51 | 311 | (54.4) |
| Georgia | 46 | 288 | (48.1) | 56 | 261 | (43.6) | 65 | 50 | (8.3) | 53 | 599 | (68.9) |
| Maryland | 43 | 52 | (32.3) | 61 | 104 | (64.6) | 65 | 5 | (3.1) | 52 | 161 | (80.9) |
| Minnesota | 51 | 50 | (45.9) | 65 | 54 | (49.5) | 62 | 5 | (4.6) | 56 | 109 | (46.6) |
| Missouri | 54 | 81 | (26.7) | 55 | 197 | (65.0) | 65 | 25 | (8.3) | 56 | 303 | (85.1) |
| New Jersey | 42 | 227 | (32.7) | 51 | 428 | (61.6) | 66 | 40 | (5.8) | 48 | 695 | (72.1) |
| North Carolina | 32 | 165 | (52.5) | 49 | 130 | (41.4) | 67 | 19 | (6.1) | 40 | 314 | (59.6) |
| Tennessee | 51 | 157 | (57.1) | 63 | 100 | (36.4) | 60 | 18 | (6.5) | 56 | 275 | (71.1) |
| Wisconsin | 46 | 143 | (40.2) | 55 | 189 | (53.1) | 67 | 24 | (6.7) | 51 | 356 | (72.1) |
| All sites combined | 46 | 1,810 | (47.7) | 56 | 1,746 | (46.0) | 67 | 238 | (6.3) | 52 | 3,794 | (69.3) |
Abbreviations: ASD = autism spectrum disorder; PDD = pervasive developmental disorder–not otherwise specified.