Literature e-cig emissions summarizing product characteristics and puff topography studied.

Puff flow rate (qpuff), puff volume (Vpuff), puff duration (dpuff), e-cig operating power and/or voltage (W), e-cig design characteristics (device) and e-liquid constituents (e-liquid). Shown are the variables tested and the outcome measures used to report emissions. Blank cells indicate that the variable or outcome was not reported.