Table 4

The likelihood of listing e-liquid ingredients and the five most commonly listed ingredients, 2014

 Older brands* (N=251)Newer brands† (N=215)Older vs newer brands
p value
Top-5 brands (N=5) %Other brands (N=246) %Top-5 vs others
p value
Older brands combined (N=251)%Newer brands (N=215)%
% listing ingredients100.078.0<0.0178.571.20.07
Mean number of ingredients listed5.24.620.524.64.0<0.05
Type of ingredients
 Propylene glycol80.084.90.8284.892.80.06
 Vegetable glycerine/glycerol80.059.40.3659.988.2<0.01
  • *Active on the internet in 2012 and 2014.

  • †Active on the internet in 2014 but not 2012.