Table 3.

Interaction effects between year and the effect size of prevalence factors of adolescent cannabis use in Chile.

	2003	2005		2007		2009		2011		2013		2015		2017
	Reference	β	P Value	β	P Value	β	P Value	β	P Value	β	P Value	β	P Value	β	P Value
Alcohol use in the past month	–	0.07	0.11	−0.25	<0.001*	−0.25	<0.001*	−0.35	<0.001*	−0.35	<0.001*	−0.36	<0.001*	−0.24	<0.001*
Tobacco use in the past month	–	0.03	0.54	−0.18	<0.001*	−0.15	0.004*	−0.23	<0.001*	−0.08	0.06	−0.09	0.045*	0.03	0.48
Friends regularly using cannabis	–	−0.06	0.23	−0.15	0.001*	−0.19	<0.001*	−0.71	<0.001*	−0.63	<0.001*	−0.81	<0.001*	−0.63	<0.001*
Low cannabis risk perception	–	0.10	0.11	0.03	0.56	−0.31	<0.001*	0.26	<0.001*	0.19	<0.001*	0.14	0.004*	0.16	0.001*
Low parental cannabis rejection	–	−0.04	0.60	0.16	0.023*	0.10	0.18	0.45	<0.001*	0.53	<0.001*	0.52	<0.001*	0.61	<0.001*
Truancy	–	−0.05	0.22	−0.06	0.17	−0.16	<0.001*	−0.37	<0.001*	–	–	−0.39	<0.001*	−0.41	<0.001*
* p < 0.05