Real-Time Characterization of E-Cigarettes Use: The 1 Million Puffs StudyBertrand Dautzenberg1,2* and Damien Bricard3
- Corresponding Author:
- Bertrand Dautzenberg
MD, Chest Department
Service de pneumologie Universitary Hospitals
Pitié Salpêtrière-Charles Foix
75651 Paris cedex 13, France
Tel: +33 61 343 7048
E-mail: [email protected]
Received date: February 25, 2015 Accepted date: June 11, 2015; Published date: June 17, 2015
Citation: Dautzenberg B, Bricard D (2015) Real-Time Characterization of E-Cigarettes Use: The 1 Million Puffs Study. J Addict Res Ther 6:229. doi:10.4172/2155-6105.1000229
Copyright: © 2015 Dautzenberg B, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The use of the electronic cigarette is now common, but the characteristic of its use remains largely unknown.
Method: We have analysed the parameters of 1 million puffs recorded by a connected e-cigarette (Smokio®).
Results: 2,001 to 23,123 puffs (median=5,405) had been produced by each of the 185 users during the 116 days of the study period. The mean puffs number by user/day is 163±138 (median: 132) with large variations between users and days for the same user. The number of puffs/day decreases significantly on week-ends compared to the first 3 days of the week (-4.60%; p<0.001). The number of puffs/hour is stable from 10:00-10:00 pm but decreases during the night time. The mean puffs duration is of 3.79±1.89s (median=3.40s). Mean puffs duration increases from 3.40±1.33s the first day of use to 4.11±1.55s after 60 days (p<0.001).
The mean duration of puffs is higher for isolated puffs (4.57±2.24s) than for series >15 puffs (3.20±1.61s) (p<0.001). The puff series contains a median of 7 consecutive puffs (mean 11.68±14.52). During the first 60-day of use, the rate of isolated puff increased from 8.14% to 11.25% (p<0.001) and the mean number of puffs by series decreased from 6.78.±8.13 to 4.66±5.07 (p<0.001). During the same 60 days of use, the number of puffs/day decreased from 209 to 127 and the puffs are less often isolated (9.28%).
Conclusions: These results may help to better characterize the use of e-cigarettes in real-world and to propose setting of electronic cigarette testing machine to characterize e-liquid emissions.