Table 2. Cigarette Discontinuation and Discontinuing Daily Cigarette Smoking at Follow-up Wave, Among Daily Cigarette Smokers Who Had No Plans to Ever Quit for Good and Who Were Not Using e-Cigarettes at Baseline Wave, as a Function of e-Cigarette Use at Follow-up Wave^a.

e-Cigarette use at follow-up	Cigarette discontinuation at follow-up wave (ie, no cigarette smoking)		Discontinuing daily cigarette smoking at follow-up wave (ie, no daily cigarette smoking)
	No. of observations (%) [95% CI]	aOR (95% CI)b	No.of observations (%) [95% CI]	aOR (95% CI)b
Overall (n = 2489)	158 (6.2) [5.0-7.5]	NA	271 (10.7) [9.1-12.5]	NA
No e-cigarette use (n = 2273)	138 (5.8) [4.7-7.2]	1 [Reference]	228 (9.9) [8.2-11.8]	1 [Reference]
Nondaily e-cigarette use (n = 156)	3 (3.1) [0.8-11.1]c	0.53 (0.08-3.35)	16 (10.2) [5.8-17.3]	0.96 (0.44-2.09)
Daily e-cigarette use (n = 60)	17 (28.0) [15.2-45.9]	8.11 (3.14-20.97)	27 (45.5) [27.4-64.9]	9.67 (4.02-23.25)

Abbreviations: aOR, adjusted odd ratios; NA, not applicable.

^a Numbers are unweighted and reflect numbers of observations; percentages, aORs, and 95% CIs are weighted using the PATH wave 5 all-waves weights for longitudinal analyses. Sample includes those who aged into the adult cohort over the course of the study period.

^b Analyses were adjusted for biological sex, race and ethnicity, age group, educational attainment, annual household income, cigarettes smoked per day, and wave pair; all covariates were assessed at baseline wave of each wave pair; generalized estimating equation models were fitted specifying the unstructured covariance and within-person correlation matrices, Wald χ²₂₂ of 95.4 (P < .001) for the cigarette discontinuation model; Wald χ²₂₂ of 170.6 (P < .001) for the daily cigarette discontinuation model.

^c Estimate should be interpreted with caution because it has low statistical precision. It is based on a denominator sample size of less than 50, or the coefficient of variation of the estimate or its complement is larger than 30%.