Table 3.

Odds ratios of independent variables in final multivariate model

Independent variables		Odds Ratio Low vs. High (95% CI)	Odds Ratio Daily vs. High (95% CI)
	Gender male	0.96 (0.43, 2.14)	0.55 (0.31, 0.95)
	female	Referent	Referent
	College no	0.91 (0.40, 2.09)	1.40 (0.80, 2.43)
	yes	Referent	Referent
	Age of first cig	0.88 (0.75, 1.04)	0.90 (0.81, 1.01)
	Cigs/lifetime < 100	1.23 (0.44, 3.40)	2.73 (0.83, 8.97)
	≥ 100	Referent	Referent
	Consider self a smoker? no	19.57 (7.13, 53.75)	0.35 (0.10, 1.32)
	yes	Referent	Referent
	How addicted? (1= not at all, 5=very)	0.55 (0.33, 0.92)	1.80 (1.27, 2.58)
	How sure can quit? (1= not at all, 5=very)	1.38 (0.87, 2.18)	0.68 (0.52, 0.90)
	Cigs/day	1.04 (0.92, 1.18)	1.14 (1.08, 1.21)
	No. of 4 closest friends who smoke (0–4)	1.12 (0.78, 1.62)	0.96 (0.74, 1.25)
	Smoke at parties
	1=Usually	0.29 (0.04, 1.91)	0.63 (0.23, 1.75)
	2=Sometimes	0.72 (0.11, 4.70)	0.86(0.25, 2.99)
	3=Rarely/Never	2.26 (0.24, 21.23)	1.81 (0.21, 15.58)
	4=Don’t go	Referent	Referent
	Smoke at bars
	1=Usually	0.51 (0.17, 1.51)	1.13 (0.61, 2.10)
	2=Sometimes	0.62 (0.22, 1.75)	0.61 (0.25, 1.50)
	3=Rarely/Never	2.83 (0.75, 10.63)	0.16 (0.03, 0.78)
	4=Don’t go	Referent	Referent
	Smoke with friends
	1=Usually	0.13 (0.33, 0.50)	3.87 (0.59, 25.42)
	2=Sometimes	0.24 (0.09, 0.68)	1.47 (0.23, 9.43)
	3=Rarely/Never	Referent	Referent

Note: values in bold are significant at p < .05