Table 2. Linear regression examining the effect of COMT and DAT1 haplotype on the visual early CNV following the cue ‘A’ (N = 195)¹.

	B	SE B	beta	t-value	p
without interaction (R2 = 0.06; p = 0.01)
Constant	−0.60±	0.89 µV
Sex	−0.53±	0.39 µV	−0.10	1.4	n.s.
DAT1	−0.76±	0.39 µV	−0.14	1.94	0.05
COMT	−0.69±	0.29 µV	−0.17	2.4	0.02
with interaction term DAT1×COMT (R2 = 0.07; p = 0.006)
Constant	−0.92±	1.23 µV
Sex	−0.51±	0.39 µV	−0.09	1.3	n.s.
DAT1	0.30±	0.71 µV	0.05	0.4	n.s.
COMT	−0.25±	0.38 µV	−0.06	0.7	n.s.
DAT1×COMT	−1.04±	0.59 µV	−0.25	1.8	0.077

¹B = regression coefficient; SE B = standard error of the regression coefficient; beta = standardized regression coefficient.