Table 4.

Sensitivity analyses showing adjusted odds ratios (OR) relating past-30-day e-cigarette use (lag 0) to respiratory symptoms, from mixed-effect logistic regression models.^a

Sensitivity Analysis Subgroup	Wheezea	Bronchitic Symptomsa	Shortness of Breatha
	OR (95%CI)	OR (95%CI)	OR (95%CI)
No past 30-day cigarette or cannabis use, n=1235b	2.92 (0.85, 10.10)	1.86 (0.83, 4.19)	1.53 (0.65, 3.63)
Participated in both waves 1–2, n=1609c	1.43 (0.99, 2.05)	1.52 (1.14, 2.02)	1.52 (1.03, 2.24)
No asthma, n=1618d	1.66 (1.11, 2.48)	1.53 (1.10, 2.12)	1.61 (1.04, 2.48)

Note.

^a= OR and 95% CI are based on mixed-effect logistic regression model with person-specific random intercept and adjustment (fixed effect) for wave, age, sex, race, parental education, secondhand exposure to cigarettes, e-cigarettes or cannabis.

^b= Sensitivity Analysis 1: Restricted to participants without any concurrent cigarette and/or cannabis use in the past 30 days.

^c= Sensitivity Analysis 2: Participants were included if they participated in both wave 1 and wave 2, adjusted additionally for concurrent cigarette and/or cannabis use.

^d= Sensitivity Analysis 3: Participants who reported no history of physician diagnosed asthma at wave 1, adjusted additionally for concurrent cigarette and/or cannabis use.