Week Long Topography Study of Young Adults Using Electronic Cigarettes in Their Natural Environment

Results ofan observational, descriptive study quantifying topography characteristics of twenty first generation electronic nicotine delivery system users intheir natural environment for aone week observation period are presented. The study quantifies inter-participant variation inpuffing topography between users and the intra-participant variation for each user observed during one week ofuse intheir natural environment. Puff topography characteristics presented for each user include mean puff duration, flow rate and volume for each participant, along with descriptive statistics ofeach quantity. Exposure characteristics including the number ofvaping sessions, total number ofpuffs and cumulative volume of aerosol generated from ENDS use (e-liquid aerosol) are reported for each participant for a one week exposure period and an effective daily average exposure. Significant inter-participant and intra-participant variation inpuff topography was observed. The observed range ofnatural use environment characteristics isused topropose aset oftopography protocols for use as command inputs todrive machine-puffedelectronic nicotine delivery systems in acontrolled laboratory environment.

Robinson, R. J., E. C. Hensel, K. A. Roundtree, A. G. Difrancesco, J. M. Nonnemaker, and Y. O. Lee. “Week Long Topography Study of Young Adults Using Electronic Cigarettes in Their Natural Environment.” Edited by Raymond Niaura. PLOS ONE 11, no. 10 (October 13, 2016): e0164038. https://doi.org/10.1371/journal.pone.0164038.