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. Author manuscript; available in PMC: 2024 Jan 17.
Published in final edited form as: J Child Psychol Psychiatry. 2023 Jun 22;64(11):1596–1607. doi: 10.1111/jcpp.13851

Table 2. Associations between additional autism and ADHD variables with trajectory classes.

Autism/ADHD variables Declining vs. Low-stable Late-emerging vs. Low-stable Late-emerging vs. Declining
OR 95% CI P-value OR 95% CI P-value OR 95% CI P-value
Autism diagnosis age 9 (parent-report) 68.1 32.0, 145.0 <0.001 2.6 0.3, 19.9 0.36 0.04 0.01, 0.25 0.001
ADHD diagnosis age 7 (DAWBA) 210.8 45.3, 981.8 <0.001 48.9 9.0, 266.4 <0.001 0.2 0.1, 0.4 <0.001
High autistic traits age 25 (self-rated AQ) 5.1 2.3, 11.5 <0.001 5.2 2.4, 11.2 <0.001 1.0 0.4, 2.9 0.98
High ADHD traits age 25 (self-rated SDQ-ADHD) 3.3 2.0, 5.3 <0.001 3.3 2.1, 5.0 <0.001 1.0 0.5, 2.0 0.97