Table 1.
Child test characteristic across child diagnosis and screening status on DFA6 from M-CHAT
| GROUP | Children without ASD | Children with ASD | F | P | |||
|---|---|---|---|---|---|---|---|
| DFA6 | N = 671 | N = 163 | |||||
| A N = 612 |
B N = 59 |
C N = 116 |
D N = 47 |
||||
| Below cut off | Cut off or higher | Below cut off | Cut off or higher | ||||
| Mean (SD) | |||||||
| IQa | 100.2 (14.1) | 73.2 (20.7) | 87.9 (20.4) | 60.2 (15.3) | 133.75* | < .001 | |
| VABSb functional language | 95.9 (12.5) | 73.2 (15.4) | 78.4 (17.2) | 61.0 (13.2) | 165.54* | < .001 | |
| ADOSc CSS | 1.4 (1.1) | 2.7 (2.2) | 5.2 (2.5) | 6.1 (2.7) | 284.10* | < .001 | |
All differences significant except group B vs. C on VABS functional language
aWASI, SB-5 or Mullen scales of early development
bVineland Adaptive Behaviour Scale—communication domain
cAutism diagnostic observation schedule 4 N in each group varies due to missing data on outcome measures (from 1 to 8 children missing)