Table 2.

Significance of the FUMO risk classes created, for each year studied. For each year, p-values and R² are provided for the combinations of risk factors in linear fixed-effect models with risk class as the fixed effect.

Year	Samples	p-Values	R2
2003	6	>0.05	0.19
2004	68	<0.01	0.12
2005	55	<0.001	0.28
2006	73	<0.01	0.16
2007	62	<0.01	0.12
2008	22	>0.05	0.08
2009	17	>0.05	−0.18
2010	27	>0.05	0.05
2011	11	NA	NA
2012	54	>0.05	−0.04
2013	36	>0.05	−0.01
2014	21	>0.05	0.09
2015	36	<0.001	0.54
2016	38	>0.05	−0.04
2017	57	<0.05	0.12
2018	52	<0.05	0.14
2019	103	<0.05	0.04
2003–2019	738	<0.001	0.1