Table 5.
Variable | Chronological age | Intellectual functioning | Sex | Sex by age interaction | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
b SE(b) | t | p value | 95% CI | b SE(b) | t | p value | 95% CI | x 2 | p value | d | b SE(b) | t | p value | 95% CI | |
ADI-R—4–5 ever/item scoresa | |||||||||||||||
Social | − .06 (.01) | 8.22 | < .001 | [− .08, − .05] | 0.92 | .337 | .08 | ||||||||
Communication | − .02 (.01) | 3.17 | .002 | [− .03, − .01] | 0.97 | .334 | .07 | ||||||||
Restricted and repetitive behavioursb | − .01 (.01) | 3.49 | < .001 | [− .01, − .01] | 5.07 | .024 | .21 | ||||||||
ADI-R—current item scoresc | |||||||||||||||
Social | − .29 (.05) | 5.58 | < .001 | [-.38, − .19] | − .06 (.01) | 7.21 | < .001 | [− .08, − .04] | 2.44 | .119 | .03 | − .13 (.07) | 1.80 | .071 | [− .27, .01] |
Communication | − .19 (.04) | 5.13 | < .001 | [− .26, − .12] | − .02 (.01) | 3.83 | < .001 | [− .04, − .01] | 0.49 | .483 | .05 | − .07 (.06) | 1.26 | .206 | [− .18, .04] |
Restricted and Repetitive Behavioursb | − .01 (.01) | 0.02 | .981 | [− .01, .01] | − .01 (.01) | 4.13 | < .001 | [− .01, − .01] | 1.72 | .189 | .30 | − .01 (.01) | 0.34 | .737 | [− .02, .02] |
ADOS Calibrated Severity Scoresd | |||||||||||||||
Total | .01 (.02) | 0.12 | .901 | [− .03, .03] | − .03 (.01) | 10.2 | < .001 | [− .04, − .03] | 0.62 | .430 | .19 | − .02 (.02) | 1.02 | .308 | [− .07, .02] |
Social affect | .01 (.01) | 0.70 | .486 | [− .02, .04] | − .03 (.01) | 9.45 | < .001 | [− .04, − .02] | 1.09 | .296 | .17 | − .01 (.02) | 0.39 | .694 | [− .05, .04] |
Restricted and repetitive behavioursb | .01 (.01) | 0.72 | .470 | [− .01, .01] | − .01 (.01) | 8.33 | < .001 | [− .01, − .01] | 0.11 | .739 | .19 | − .02 (.01) | 2.74 | .008 | [− .03, − .01] |
b regression coefficient, SE(b) standard error of regression coefficient, t t-statistic, 95% CI 95% Confidence Interval of regression coefficient
ADI-R Autism Diagnostic Interview—Revised, ADOS Autism Diagnostic Observation Schedule
a ADI-R 4-to-5 diagnostic/ever scores analyses: N = 1114 participants included
b log-transformed scores
c ADI-R current scores analyses: N = 705 participants included
dADOS analyses: N = 846 participants included