Table 3.

Post hoc probing of interactions of rs13280604 variants at high and low levels of ADHD symptoms (n = 871).

	Non-use vs. use						Number of smoked
	Intercept		Slope		Quad		Intercept		Slope		Quad
Condition	b	95% CI	b	95% CI	b	95% CI	b	95% CI	b	95% CI	b	95% CI
HI-High
Intercept	NA		1.36	−11.25, 13.98	−1.27	−7.40, 4.87	−1.78	−4.06, 0.50	3.89	−0.64, 8.41	−1.51	−3.68, 0.66
AA	1.99	−1.00, 4.97	−2.90	−10.12, 4.33	0.96	−3.21, 0.67	0.21	−0.79, 1.21	−0.08	−1.93, 1.78	−0.74	−0.82, 0.68
AG	3.42*	0.30, 6.53	−6.74*	−13.42, −0.05	3.08	−4.27, −012	0.90	−0.03, 1.84	−0.39	−2.04, 1.26	0.10	−0.62, 0.82
HI-Low
Intercept	NA		−3.29	−17.66, 11.09	−0.83	−8.03, 6.37	−0.65	−3.11, 1.81	0.01	−4.41, 4.42	0.50	−1.52, 2.52
AA	1.16	−1.45, 3.78	−1.82	−11.51, 7.87	−1.29	−1.90, 7.54	−1.54***	−2.24, −0.84	2.44*	0.35, 4.52	−1.30*	−2.34, −0.26
AG	0.69	−2.77, 4.15	0.20	−10.87, 11.26	−2.20	−3.74, 6.70	−0.65	−1.39, 0.08	1.55	−0.89, 3.98	−0.81	−2.03, 0.42
IN-High
Intercept	NA		−9.68	−23.81, 4.45	2.41	−4.36, 9.19	−0.07	−2.01, 1.87	−1.03	−5.34, 3.28	0.83	−1.18, 2.84
AA	−0.91	−3.85, 2.03	4.71	−6.04, 15.45	−10.47	−5.22, 4.28	−1.69**	−2.90, −0.48	3.58*	0.69, 6.47	−1.69**	−2.92, −0.46
AG	−1.26	−4.90, 2.38	6.40	−4.31, 17.12	−1.76	−6.58, 3.05	−0.89	−1.83, 0.05	2.93*	0.33, 5.53	−1.31*	−2.58, −0.05
IN-Low
Intercept	NA		7.85	−5.65, 21.34	−4.54	−11.68, 2.59	−2.63**	−4.48, −0.79	5.12*	0.81, 9.44	−1.93	−4.12, 0.26
AA	4.08*	0.77, 7.40	−9.53*	−18.32, −0.74	4.27	−0.59, 9.13	0.39	−0.49, 1.26	−1.36	−2.93, 0.21	0.39	−0.38, 1.15
AG	5.39**	1.66, 9.11	−12.97**	−22.32, −3.62	6.32*	1.18, 11.47	1.28**	0.55, 2.01	−1.87*	−3.63, −0.12	0.66	−2.67, 1.58

^*p < .05.

^**p < .01.

^***p < .001.