. 2018 Aug 14;20(Suppl 1):S55–S61. doi: 10.1093/ntr/nty114

Table 4.

Multinomial Logistic Regression Models of Cumulative Marketing Exposure and Past 30-day Tobacco Use (National Youth Tobacco Survey, 2014; n = 20685)

	Nonusers^a (n = 17096)^b	Single users^a (n = 1822)^b	Dual users^a (n = 885)^b	Poly users^a (n = 882)^b
	Relative risk ratio (95% confidence interval)	Relative risk ratio (95% confidence interval)	Relative risk ratio (95% confidence interval)	Relative risk ratio (95% confidence interval)
Nonuser as referent
Marketing exposure^c	1.00 (Ref)	*1.03 (1.02–1.05**)	*1.06 (1.04–1.07**)	*1.07 (1.06–1.08**)
Single as referent
Marketing exposure^c	—	1.00 (Ref)	*1.02 (1.00–1.04**)	*1.03 (1.02–1.05**)
Dual as referent
Marketing exposure^c	—	—	1.00 (Ref)	1.01 (0.99–1.03)

All models adjusted for grade level, sex, and race. Bold indicates statistical significance.

^aCorresponds to the number of tobacco products used in past 30 days.

^bUnweighted sample size.

^cSum of number of product marketing sources exposed (0–32).

* p < .001.