Table 6.
IQ and ASD symptom measures for extremely preterm children with and without prior ASD diagnosis
| Prior diagnosis | No prior diagnosis | t | p | d | |||||
|---|---|---|---|---|---|---|---|---|---|
| n | Mean | SD | n | Mean | SD | ||||
| Nonverbal IQ | 38 | 75.3 | 26.9 | 21 | 61.5 | 21.7 | 2.0 | .049 | 0.5 |
| Verbal IQ1 | 36 | 65.9 | 30.6 | 21 | 56.9 | 23.9 | 1.2 | .25 | 0.3 |
| Social Communication | |||||||||
| ADI-R2 reciprocal social interaction | 36 | 22.1 | 6.5 | 21 | 16.9 | 7.3 | 2.8 | .007 | 0.8 |
| ADI-R nonverbal communication | 36 | 9.6 | 4.1 | 21 | 8.2 | 4.0 | 1.3 | .22 | 0.3 |
| ADI-R verbal communication | 30 | 7.0 | 2.2 | 16 | 5.1 | 2.5 | 2.7 | .009 | 0.8 |
| ADI-R B2 social initiation | 30 | 3.5 | 1.0 | 16 | 2.9 | 1.3 | 1.7 | .13 | 0.5 |
| ADI-R B3 stereotyped speech | 30 | 3.5 | 1.7 | 16 | 2.1 | 1.6 | 2.7 | .010 | 0.8 |
| ADOS-2 module 1/2 RRB total | 12 | 13.7 | 3.8 | 6 | 14.8 | 4.4 | 0.6 | .56 | 0.3 |
| ADOS-2 module 3 RRB total | 26 | 11.5 | 5.0 | 15 | 9.9 | 3.8 | 1.0 | .31 | 0.3 |
| ADOS-2 RRB calibrated severity | 38 | 7.6 | 2.3 | 21 | 7.3 | 1.8 | 0.5 | .65 | 0.1 |
| Restricted and repetitive behaviors (RRB) | |||||||||
| ADI-R RRB total | 36 | 5.6 | 2.7 | 21 | 3.5 | 2.8 | 2.7 | .009 | 0.7 |
| ADOS-2 module 1/2 RRB total | 12 | 5.2 | 2.2 | 6 | 4.8 | 1.9 | 0.3 | .76 | 0.2 |
| ADOS-2 module 3 RRB total | 26 | 3.6 | 1.7 | 15 | 2.9 | 2.1 | 1.1 | .27 | 0.4 |
| ADOS-2 RRB calibrated severity | 38 | 8.1 | 1.9 | 21 | 7.3 | 2.2 | 1.3 | .19 | 0.4 |
1
Two participants were missing verbal IQ scores
2
Two participants were missing ADI-R scores