Table 3 Processing speed regressed on categorical diagnostic labels—comparing when the 7 disorders are included in one regression model predicting processing speed (as indexed by PC1), and when each one is modeled alone.

	Each Diagnosis Modeled in Separate Models						Diagnoses Modeled Together
	beta	SE	p-value	F statistic	df	Adjusted R²	beta	SE	p-value
ADHD-I	−0.444	0.106	7.21E-05***	32.34054	792	0.19	−0.546	0.109	6.32E-07***
ADHD-C	−0.175	0.115	0.182	29.24027	792	0.18	−0.322	0.118	0.0065**
ASD	−0.316	0.140	0.043*	29.79968	792	0.18	−0.153	0.133	0.25
SLD-Math	−0.981	0.109	1.30E-17***	45.16474	792	0.25	−0.844	0.111	6.87E-14***
SLD-Reading	−0.674	0.116	3.20E-08***	35.62329	792	0.21	−0.444	0.115	0.00011***
Anxiety	0.048	0.106	0.65	28.81604	792	0.17	0.0232	0.101	0.82
Depression	0.172	0.180	0.40	28.95878	792	0.17	0.144	0.171	0.4

For all regression models, demographic variables (age, sex, SES, collection site) and grooved pegboard were included as nuisance covariates. For the single diagnosis models, p values were FDR-corrected.

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