Table 4.

Linear Regression Model Summary: Prediction of Behavior Regulation Index (BRI) (Total sample n = 142^a)

Predictor	B	SE B	95% confidence interval		t	P	β
			Lower	Upper
Sex	−5.21	2.25	−9.65	−0.77	−2.32	0.022*	−0.17
Age	−0.34	0.29	−0.92	0.23	−1.18	0.239	−0.08
Full‐scale IQ	0.08	0.07	−0.06	0.22	1.13	0.261	0.08
SRS_total	0.52	0.06	0.39	0.65	8.10	<0.001**	0.59
ASD PGS subgr P < 0.1	4.07	1.70	0.71	7.44	2.40	0.018*	0.17
ADHD PGS subgr P < 0.1	−2.05	1.61	−5.23	1.13	−1.27	0.205	−0.09
INT PGS subgr P < 0.1	−0.61	1.79	−4.16	2.93	−0.34	0.732	−0.02

Model's R ² = 0.408 (unadjusted). Models P‐value = <0.001**.

B, unstandardized regression coefficients; BRIEF‐BRI, Behavior Rating Inventory of Executive Functions, Behavior Regulation Index; BRIEF‐GEC, Behavior Rating Inventory of Executive Functions, Global Executive Composite; BRIEF‐MI, Behavior Rating Inventory of Executive Functions, Metacognition Index; IQ, intelligence quotient; SE , standard error; SRS, Social Responsiveness Scale; β, standardized regression coefficients.

ASD PGS subgroup P < 0.1: ASD polygenic groups low, moderate, and high based on the autism spectrum disorder polygenic score at P < 0.1.

ADHD PGS subgroup P < 0.1: ADHD polygenic groups low, moderate, and high based on the attention deficit/hyperactivity disorder polygenic score at P < 0.1.

INT PGS subgroup P < 0.1: INT polygenic groups low, moderate, and high based on the general intelligence polygenic score at P < 0.1.

*P < 0.05 (two‐tailed); **P < 0.01 (two‐tailed).

^a n corresponds to participants without any missing variables in outcomes or covariates (in the total sample of the study n = 176, there were 19 missing on SRS total and 11 missing on full‐scale IQ). The covariates are included in the table to show their contribution to the model.