Table 1.
Participant characteristics between the ASD and non-ASD groups
| Characteristics | N | ASD (N=825; 65%) |
Non-ASD (N=446; 35%) |
Total (N=1,271) |
t or χ2 |
|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | Mean (SD) | |||
| Male (%)† | 1,271 | 84.6 | 51.1 | 72.9 | 164.14*** |
| Age (months)‡ | 1,271 | 92.2 (64.1) | 82.9 (58.6) | 88.9 (62.4) | 2.53** |
| FSIQ‡ | 647 | 82.5 (26.6) | 105.3 (18.9) | 90.5 (26.5) | -12.64*** |
| ADI-R score‡ | |||||
| Algorithm A | 1,271 | 19.9 (6.4) | 2.7 (3.1) | 13.9 (9.9) | 64.34*** |
| Algorithm B verbal | 864 | 15.9 (4.8) | 1.7 (2.3) | 10.0 (8.0) | 57.20*** |
| Algorithm B nonverbal | 407 | 10.8 (2.9) | 2.3 (2.1) | 8.9 (4.5) | 30.41*** |
| Algorithm B nonverbal only | 1,271 | 10.0 (3.3) | 1.4 (1.8) | 7.0 (5.0) | 60.34*** |
| Algorithm C | 1,271 | 5.3 (2.6) | 0.7 (1.1) | 3.7 (3.1) | 45.23*** |
| Algorithm D | 1,271 | 3.6 (1.2) | 0.4 (0.9) | 2.5 (1.9) | 54.91*** |
| Level of functioning (%)† | |||||
| Language delay | 1,271 | 48.7 | 6.5 | 33.3 | 230.31*** |
| Regression of language | 1,271 | 5.2 | 0.9 | 3.7 | 15.14*** |
| Loss of skills | 1,271 | 3.6 | 0.0 | 2.4 | 16.61*** |
**
p<0.01,
***
p<0.001,
†
chi-square test,
‡
t-test.
ASD: autism spectrum disorder, FSIQ: full scale intelligence quotient, ADI-R: Autism Diagnostic Interview-Revised, Algorithm A: Social Interaction, Algorithm B: Communication, Algorithm C: Restricted, Repetitive, and Stereotyped Patterns of Behavior, Algorithm D: Abnormality of development before 36 months