Table 3.

Results from the linear GEE models (with 20 imputed datasets) that examined readiness to quit tobacco and cannabis use simultaneously, according to H2 and H3.

Hypothesis	Parameter	B	Standard error	95% CI		P
				lower	upper
H2	Intercept	1.83	0.38	1.07	2.58	<.001
	Groups NF & MIa	0.07	0.25	-0.43	0.56	.80
	Time t2b	-0.06	0.42	-0.89	0.78	.90
	Time t1b	0.59	0.19	0.22	0.96	.002
	Time t2b× Groups NF & MIa	-0.12	0.40	-0.90	0.66	.76
	Time t1b× Groups NF & MIa	-0.40	0.22	-0.83	0.03	.07
	Baseline readiness to stop cannabis use	0.57	0.04	0.48	0.65	<.001
	Female genderc	0.17	0.29	-0.40	0.74	.56
H3	Intercept	1.59	0.45	0.70	2.47	<.001
	Group MId	0.20	0.29	-0.37	0.76	.50
	Time t2b	-0.03	0.42	-0.88	0.81	.94
	Time t1b	0.22	0.14	-0.06	0.50	.13
	Time t2b× Group MId	-0.30	0.45	-1.18	0.58	.50
	Time t1b× Group MId	-0.06	0.28	-0.60	0.48	.83
	Baseline readiness to stop cannabis use	0.59	0.05	0.49	0.69	<.001
	Female genderc	0.29	0.41	-0.50	1.09	.47

^areference: PE.

^breference: Time t0 (baseline).

^creference: male gender.

^dreference: NF.