Table 2.

Linear regression models: difference of smoking prevalence in 2015 and 2010 (dependent variable); Policy score of 2010 (continuous), smoking prevalence in 2010 and income category (categorical; independent variables) by sex.

	Model 1				Model 2 (with Interaction Term)
	Males		Females		Males		Females
	β	p-Value	β	p-Value	β	p-Value	β	p-Value
PS 2010	−0.037	0.013	−0.007	0.077	−0.027	0.111	−0.006	0.181
Income category		0.072		0.424		0.027		0.970
LDCs	1.468		−0.441		6.136		−0.208
LMICs	2.561		−0.002		4.443		−0.254
UMICs	0.295		−0.011		−0.470		0.114
HICs	ref		ref		ref		ref
Income category × PS 2010	-		-			0.004		0.132
LDCs					−0.123		−0.007
LMICs					−0.035		0.004
UMICs					0.010		−0.002
HICs					ref		ref
Smoking Prev 2010	0.001	0.013	−0.053	<0.001	−0.130	0.663	−0.055	<0.001

PS, policy percentage scores; LDCs, Least Developed Countries; LMICs, Low Middle Income Countries; UMICs, Upper Middle Income Countries; HICs, High Income Countries.