Table 3.

Multiple linear regression analyses by the level of IQ performance

	B	s.e.	β	t	p	F	df	p	adj. R2
IQ
Overall model						7.69	13, 481	<0.001	0.150
(Constant)	88.699	9.44		9.39	<0.001
Age	0.107	0.09	0.05	1.20	0.230
Sex	−0.409	1.38	−0.02	−0.30	0.767
BD	0.410	14.35	0.01	0.03	0.977
SZ	−6.663	11.70	−0.25	−0.57	0.569
ICV	0.014	0.01	0.20	2.48	0.013
BD*ICV	−0.004	0.01	−0.20	−0.43	0.669
SZ*ICV	−0.001	0.01	−0.06	−0.12	0.901
ASP	−15.138	21.67	−0.43	−0.70	0.485
ASP*ICV	0.009	0.01	0.39	0.66	0.512
BD*ASP	4.803	36.29	0.08	0.13	0.895
SZ*ASP	−79.300	36.25	−1.16	−2.19	0.029
BD*ASP*ICV	0.000	0.02	0.01	0.02	0.985
SZ*ASP*ICV	0.048	0.02	1.12	2.13	0.034
Verbal IQ
Overall model						4.41	13, 481	<0.001	0.082
(Constant)	88.193	10.06		8.77	<0.001
Age	−0.071	0.10	−0.03	−0.75	0.454
Sex	−1.789	1.47	−0.07	−1.22	0.225
BD	22.12	15.29	0.72	1.45	0.149
SZ	6.215	12.46	0.23	0.50	0.618
ICV	0.015	0.01	0.21	2.56	0.011
BD*ICV	−0.016	0.01	−0.82	−1.68	0.095
SZ*ICV	−0.008	0.01	−0.49	−1.06	0.289
ASP	9.714	23.08	0.27	0.42	0.674
ASP*ICV	−0.007	0.01	−0.33	−0.53	0.597
BD*ASP	−26.473	38.64	−0.43	−0.69	0.494
SZ*ASP	−106.146	38.60	−1.51	−2.75	0.006
BD*ASP*ICV	0.021	0.02	0.53	0.86	0.393
SZ*ASP*ICV	0.065	0.02	1.48	2.72	0.007
Performance IQ
Overall model						9.79	13, 481	<0.001	0.188
(Constant)	91.343	9.63		9.48	<0.001
Age	0.293	0.09	0.14	3.21	0.001
Sex	1.009	1.41	0.04	0.72	0.475
BD	−24.344	14.64	−0.77	−1.66	0.097
SZ	−21.337	11.93	−0.78	−1.79	0.074
ICV	0.009	0.01	0.13	1.62	0.106
BD*ICV	0.011	0.01	0.56	1.21	0.226
SZ*ICV	0.009	0.01	0.51	1.17	0.242
ASP	−37.575	22.10	−1.01	−1.70	0.090
ASP*ICV	0.024	0.01	1.03	1.76	0.079
BD*ASP	34.675	37.01	0.55	0.94	0.349
SZ*ASP	−34.906	36.97	−0.49	−0.94	0.346
BD*ASP*ICV	−0.020	0.02	−0.50	−0.87	0.385
SZ*ASP*ICV	0.020	0.02	0.44	0.86	0.391

BD (bipolar disorder spectrum); SZ (schizophrenia spectrum); IQ (intelligence quotient); ICV (intracranial volume); ASP (birth asphyxia).

Bold values denote statistical significance at the p < 0.05 level.