Table 3

Path coefficients from mediation analysis for the effects of lower risk and lower exposure claims on susceptibility to use MRTPs

	Perceived quantity					Perceived risk
	a	b	c	c′	Mediated effect	a	b	c	c′	Mediated effect
EXPERIMENT 1
Adults (n=2352)
Risk claim	−0.17**	−0.41**	0.12*	0.05	0.07**	−0.14**	−0.34**	0.12**	0.08*	0.5**
IQOS versus snus	−0.28**	−0.40**	0.30**	0.19**	0.11**	−0.21**	−0.33**	0.30**	0.23**	0.07**
E-cigarettes versus snus	−0.40**	−0.40**	0.30**	0.14**	0.16**	−0.29**	−0.33**	0.30**	0.20**	0.09**
Adolescents (n=480)
Risk claim	0.28**	−0.17**	−0.02	−0.02	0.05**	−0.23*	−0.20**	0.02	−0.02	0.05*
IQOS versus snus	−0.21*	−0.17**	−0.01	−0.02	0.04**	−0.18*	−0.20**	0.01	−0.02	0.04*
E-cigarettes versus snus	−0.33**	−0.17**	−0.03	−0.03	0.06**	−0.35**	−0.20**	0.03	−0.04	0.07**
EXPERIMENT 2
Adults (n=2445)
Exposure claim	−0.31**	−0.29**	0.06	−0.03	0.09**	−0.18**	−0.31**	0.06	0.01	0.06**
IQOS versus snus	−0.12*	−0.27**	0.31**	−0.27**	0.03**	−0.12*	−0.30**	0.31**	0.27**	0.04*
E-cigarettes versus snus	−0.15**	−0.27**	0.27**	−0.23**	0.04**	−0.17**	−0.30**	0.27**	0.22**	0.05**
Adolescents (n=489)
Exposure claim	−0.39**	0.19**	0.01	−0.07	0.07**	−0.19*	−0.18**	0.01	−0.03	0.04*
IQOS versus snus	−0.21*	0.17**	0.05	0.01	0.04*	−0.21*	−0.18**	0.05	0.01	0.04*
E-cigarettes versus snus	−0.20*	0.17**	0.08	0.05	0.03*	−0.21*	−0.18**	0.08	0.04	0.04*

a=path from independent variable to mediator. b=path from mediator to dependent variable. c=path from independent variable to dependent variable (total effect). cꞌ=c path adjusted for mediator (direct effect).
↵*P<0.05, **P<0.001.
MRTPs, modified risk tobacco products.