Table 3.

Logistic regressions of adolescent smoking patterns on adult smoking, National Longitudinal Study of Adolescent to Adult Health (Add Health), 1994–2008 [Public Use]

Unadjusted Odds ratio [95% confidence interval]		Adjusted Odds ratio [95% confidence interval]
Adolescent smoking
No	reference	reference
1–5 cpd (light)	3.03 [2.50, 3.67]	2.45 [2.00, 3.00]
6–16 cpd (average)	7.72 [5.82, 10.22]	5.57 [4.17, 7.43]
17 or more cpd (heavy)	7.78 [5.09, 11.89]	5.23 [3.29, 8.31]
1Adolescent close friends who smoked
No close friends smoke		reference
1 close friend smokes		1.37 [1.13, 1.66]
2 close friends smoke		1.56 [1.23, 1.98]
3 close friends smoke		1.81 [1.44, 2.26]
2Depression symptoms in adolescence
No		reference
Yes		1.17 [0.95, 1.44]
Adolescent body mass index
Normal		reference
Overweight		1.25 [1.02, 1.53]
Obese		1.07 [0.84, 1.36]
Race/ethncity
Non-Hispanic white		reference
Non-Hispanic black		0.87 [0.63, 1.20]
Hispanic		0.75 [0.60, 0.95]
Other		0.86 [0.56, 1.32]
Sex
Female		reference
Male		1.51 [1.32, 1.73]

cpd=cigarettes per day smoked on the days in which the participant smoked during the previous month

¹Participants were asked if any of their three best friends smoked.

²Cut point was a score of 24 on the Center for Epidemiologic Studies Depression Scale.

Wald test p<.0001 for both unadjusted analysis and adjusted model.

Adjusted model includes depressive symptoms in adolescence, adolescent close friends who smoked, adolescent body mass index, race/ethnicity and sex.