Table 2.
Surveillance Factors That Influenced a Change in Classification From ASD to Non-ASD Noted in Surveillance Records
| No Change in ASD Classification, N = 1331 N (%) |
Change in ASD Classification, N = 61 N (%) |
χ2 | p | |
|---|---|---|---|---|
| Final ADDM surveillance definition | ||||
| Meets ASD surveillance criteria | 1273 (96) | 54 (89) | 6.64 | .02 |
| Does not meet ASD surveillance criteria | 58 (4) | 7 (11) | ||
| Number of surveillance records | ||||
| One surveillance record | 147 (11) | 1 (2) | 5.43 | .02 |
| Multiple surveillance records | 1184 (89) | 60 (98) | ||
| Professional who recorded first ASD diagnosis | ||||
| EDD or EDS educator | 97 (7) | 3 (5) | 12.0 | .10 |
| MD developmental paediatrician | 284 (21) | 15 (25) | ||
| MD neurologist | 118 (9) | 4 (7) | ||
| MD other | 81 (6) | 4 (7) | ||
| PhD psychologist | 313 (24) | 10 (16) | ||
| PhD other | 42 (3) | 5 (8) | ||
| Other professional | 154 (12) | 3 (5) | ||
| Professional not stated | 242 (18) | 17 (28) | ||
| Source of surveillance records | ||||
| Education-only records | 603 (45) | 21 (35) | 2.85 | .24 |
| Health-only records | 194 (15) | 10 (16) | ||
| Both education and health records | 534 (40) | 30 (49) | ||
| Surveillance site | ||||
| Arizona | 400 (30) | 19 (31) | 15.5 | .01 |
| Georgia | 417 (31) | 29 (48) | ||
| Maryland | 342 (26) | 3 (5) | ||
| South Carolina | 172 (13) | 10 (16) | ||
| Surveillance year | ||||
| 2000 | 450 (34) | 11 (18) | 6.55 | .01 |
| 2006 | 881 (66) | 50 (82) | ||
ASD, autism spectrum disorder; ADDM, autism and developmental disabilities monitoring.