Table 2:

Relative Risk Ratios from the Multinomial Regression of Age-Based Trajectories of Number of Cigarettes per Day on Parent and Peer Smoking Behaviors

	Ref=Non-Smokers
	Late Peak	Early Peak	High
1. No Controls
Ref=Neither Parents Nor Peers Smoke
Parents Smokes/Peers Do Not Smoke	1.848 ***	1.743 ***	2.349 ***
Parents Does Not Smoke/Peers Smoke	2.058 ***	3.818 ***	5.760 ***
Both Parents and Peers Smoke	3.084 ***	5.625 ***	12.420 ***
2. Sociodemographic Controls
Ref=Neither Parents Nor Peers Smoke
Parents Smokes/Peers Do Not Smoke	1.756 ***	1.709 ***	1.862 ***
Parents Does Not Smoke/Peers Smoke	1.952 ***	3.943 ***	5.112 ***
Both Parents and Peers Smoke	2.871 ***	5.573 ***	9.056 ***
3. Sociodemographic Controls and Parent-Child Relations
Ref=Neither Parents Nor Peers Smoke
Parents Smokes/Peers Do Not Smoke	1.827 ***	1.706 ***	1.978 ***
Parents Does Not Smoke/Peers Smoke	1.877 ***	3.662 ***	4.500 ***
Both Parents and Peers Smoke	2.931 ***	5.161 ***	8.832 ***
4. Sociodemographic Controls, Parent-Child Relations, and Availability of Cigarettes
Ref=Neither Parents Nor Peers Smoke
Parents Smokes/Peers Do Not Smoke	1.807 ***	1.540 **	1.435 *
Parents Does Not Smoke/Peers Smoke	1.878 ***	3.627 ***	4.333 ***
Both Parents and Peers Smoke	2.891 ***	4.551 ***	6.024 ***

n=10,166

^***P<0.001

^**P<0.01

^*p<0.05

⁺p<0.10