Methods Participants (n= 1198) were recruited through online surveys posted to social
media sites with a monetary incentive. Participants were grouped by inhalant use, with 8% e-
cigarette users, 12% conventional tobacco users, 30% dual users, and 51% non-
smokers/non-vapers. Results Dual use of e-cigarettes and conventional tobacco was
associated with increased sleep latency relative to non-smokers/non-vapers (p= 0.012).
Dual use was also associated with a higher reporting of cough (p= 0.034), as well as …

The health effects of e-cigarettes remain relatively unknown, including their impact on sleep
quality. We previously showed in a pilot study that females who smoke both conventional
tobacco and vape e-cigarettes (dual users) had decreased sleep quality (measurement of
how well an individual is sleeping) and increased sleep latency (amount of time to fall
asleep), suggesting an influence by gender. Cough is also known to adversely impact sleep
quality and may be caused by inhalant use. As a result, we undertook this study to assess …