Table 5.

Linear Regression Model Summary: Prediction of Metacognition Index (MI) (Total sample n = 146^a)

Predictor	B	SE B	95% confidence interval		t	P	β
			Lower	Upper
Sex	−2.45	1.87	−6.15	1.25	−1.31	0.192	−0.10
Age	−0.17	0.23	−0.63	0.29	−0.72	0.471	−0.05
Full‐scale IQ	0.05	0.06	−0.07	0.16	0.83	0.407	0.06
SRS_total	0.40	0.05	0.30	0.51	7.56	< 0.001**	0.57
ASD PGS subgr P < 0.1	1.36	1.41	−1.43	4.16	0.97	0.336	0.07
ADHD PGS subgr P < 0.1	0.99	1.34	−1.65	3.63	0.74	0.461	0.05
INT PGS subgr P < 0.1	1.15	1.42	−1.66	3.97	0.81	0.420	0.06

Model's R ² = 0.359 (unadjusted). Models P‐value < 0.001.

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.

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.

*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.