Table 3.

Main effects of each inhaled substance use on asthma stratified by sex adjusting for sexual identity, age, race or ethnicity, and BMI

	Model 1. Among Females (n = 15,275) RRR (95% CI)	Model 2. Among Males (n = 14,838) RRR (95% CI)
Cigarettes	1.41 (1.61–1.72)	1.35 (1.10–1.65)
Cigars	1.58 (1.28–1.96)	1.35 (1.14–1.62)
Electronic vapor products	1.46 (1.21–1.77)	1.28 (1.12–1.45)
Inhalants	1.51 (1.24–1.84)	1.88 (1.36–2.59)
Synthetic marijuana	—*	1.66 (1.32–2.08)

Definition of abbreviations: BMI = body mass index; CI = confidence interval; RRR = relative risk ratio.

To be parsimonious, results from those whose asthma diagnosis is unknown unsure are not presented in the table but were included in the model. Data available upon request.

^*Main effect for synthetic marijuana not reported owing to significant interaction term; see Results section.