Smoking cigarettes of low nicotine yield does not reduce nicotine intake as expected: a study of nicotine dependency in Japanese males

Table 2 Regression coefficients and partial correlation coefficients for urinary cotinine concentration in a multiple regression model

Variable	Regression coefficients		Partial correlation coefficients
	B	p	r	p
Figure 1
Intercept	5.270	<0.001
Nicotine yield by machine	0.762	0.001	0.23	<0.001
Number of cigarettes consumed	0.045	<0.001	0.43	<0.001
Interaction	-0.012	0.16
Figure 2
Intercept	4.994	<0.001
Nicotine yield by machine	0.793	0.001	0.18	<0.001
FTND score	0.268	<0.001	0.52	<0.001
Interaction	-0.079	0.057

ISSN: 1471-2458