Table 2.

Number of Smoking Friends at Wave 1, and Intentions to Quit Smoking at Wave 1 and Wave 2, Attempts to Quit Smoking at Wave 2, and Successful Quit Attempts at Wave 2^a

Smoking Cessation Outcome	Intentions to Quit at Wave 1 (N=6,321)				Intentions to Quit at Wave 2 (N=5,739)				Attempts to Quit at Wave 2 (N=6,321)				Successful Quit Attempts at Wave 2 (N=2,308)
Variable	n and (%) Intend to Quit at W1	ORb	95% CIc	p	n and (%) Intend to Quit at W2	ORb	95% CIc	p	n and (%) Attempted to Quit	ORb	95% CIc	p	n and (%) Successful Quit Attempts	ORb	95% CIc	p
Number of smoking friends at Wave 1
0	830(38.5)	1.00	1.00	refd	741(32.9)	1.00	1.00	refd	830(38.7)	1.00	1.00	refd	320(21.1)	1.00	1.00	refd
1	840(42.9)	1.21	0.94,1.55	0.15	747(34.5)	1.06	0.81,1.39	0.67	840(37.7)	0.92	0.72,1.18	0.53	316(23.4)	1.20	0.76,1.89	0.44
2	1228(36.8)	0.89	0.70,1.12	0.32	1092(33.7)	1.09	0.84,1.41	0.52	1228(36.4)	0.91	0.72,1.14	0.42	445(22.0)	1.04	0.68,1.59	0.85
3	1270(38.6)	0.95	0.75,1.21	0.70	1159(30.7)	0.86	0.66,1.12	0.27	1270(38.2)	0.97	0.77,1.22	0.77	466(18.8)	0.89	0.58,1.36	0.59
4	820(33.5)	0.80	0.62,1.04	0.09	757(27.6)	0.81	0.61,1.08	0.15	820(35.4)	0.87	0.67,1.12	0.28	291(16.3)	0.71	0.43,1.17	0.18
5	1333(31.5)	0.76	0.59,0.96	0.02	1243(27.1)	0.86	0.66,1.12	0.25	1333(36.3)	0.97	0.77,1.23	0.83	470(12.6)	0.60	0.38,0.95	0.03

^aadjusting for demographics, and smoking cessation predictor variables

^bOR=adjusted odds ratio

^c95% confidence interval

^dref=reference group