| Age | IQ | Language age | Behavior problems not specific to ASD | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Parent reported | Clinician observed | |||||||||
| N | M (SD) | N | M (SD) | N | M (SD) | N | M (SD) | N | M (SD) | |
| ADI-R | ||||||||||
| ASD diagnoses - True positive | 44 | 41.1 (3.0) | 43 | 64.0 (25.0) | 42 | 19.2 (9.9) | 44 | 0.7 (0.2) | 44 | 0.5 (0.4) |
| ASD diagnoses - False negative | 22 | 41.4 (2.6) | 20 | 79.1 (21.5)* | 22 | 26.7 (10.0)** | 22 | 0.6 (0.2) | 22 | 0.5 (0.5) |
| Other diagnoses - False positive | 28 | 40.9 (2.4) | 28 | 74.3 (19.0)*** | 27 | 22.8 (10.3)** | 27 | 0.8 (0.3)*** | 28 | 0.4 (0.3)a |
| Other diagnoses - True negative | 275 | 41.5 (2.1) | 272 | 88.2 (18.3) | 267 | 30.0 (10.6) | 265 | 0.5 (0.3) | 275 | 0.2 (0.3) |
| ADOS | ||||||||||
| ASD diagnoses - True positive | 59 | 41.3 (2.9) | 56 | 67.9 (25.3) | 57 | 21.5 (10.7) | 59 | 0.6 (0.2) | 59 | 0.5 (0.4) |
| ASD diagnoses - False negative | 7 | 40.5 (2.7) | 7 | 75.6 (20.9) | 7 | 24.1 (8.7) | 7 | 0.6 (0.2) | 7 | 0.3 (0.3) |
| Other diagnoses - False positive | 51 | 41.3 (2.2) | 49 | 77.5 (21.6)*** | 49 | 26.0 (11.2)* | 48 | 0.6 (0.2) | 51 | 0.4 (0.4)*** |
| Other diagnoses - True negative | 252 | 41.5 (2.2) | 251 | 88.8 (17.7) | 245 | 30.0 (10.5) | 244 | 0.6 (0.3) | 252 | 0.2 (0.3) |
a
P = 0.050
***
P < 0.001;
**
P < 0.01;
*
P < 0.05.
ADI-R, autism diagnostic interview-revised; ADOS, autism diagnostic observation schedule; ASD, autism spectrum disorder. Cutoffs: ADI-R Clinical [Kim & Lord, 2012], ADOS ASD [Lord et al., 2012].