Table 2

Patterns of use among current e-cigarette users,* 2013–2014 PATH Study Wave 1 Survey

Infrequent e-cigarette users†
(%, 95% CI)
(n=1559)
Moderate e-cigarette users‡
(%, 95% CI)
(n=1340)
Daily e-cigarette users§
(%, 95% CI)
(n=734)
p Value
Years since first use¶0.0192
  028.4 (26.0 to  30.8)31.9 (28.8 to  35.0)36.4 (32.4 to 40.4)
  137.6 (35.2 to  40.1)38.5 (35.5 to 41.5)31.0 (27.3 to 34.6)
  2–324.2 (21.8 to 26.6)21.1 (18.7 to 23.5)22.4 (18.6 to 26.2)
  4–55.5 (4.2 to 6.8)4.5 (3.2 to 5.8)5.4 (3.4 to 7.5)
  6+4.2 (2.9 to 5.5)4.0 (2.7 to 5.2)4.8 (2.9 to 6.6)
First e-cigarette non-tobacco flavoured<0.0001
  Yes54.8 (52.3 to 57.3)60.7 (57.5 to 63.8)65.2 (60.9 to 69.4)
Number of e-cigarette cartridges now used each day on average**
  0††††‡‡
 <1††††39.4 (35.1 to 43.6)
  1††††37.3 (33.9 to 40.8)
  2–4††††14.1 (11.1 to 17.1)
  5–9††††3.7 (1.9 to 5.6)
  10+††††3.1 (1.7 to 4.6)
Number of days used in the past 30 days
  054.1 (51.2 to 57.0)††††
  1–245.9 (43.0 to 48.8)††††
  3–4††22.6 (20.1 to 25.0)††
  5–9††32.8 (30.1 to 35.4)††
  10–29††40.5 (37.6 to 43.5)††
  30††4.1 (3.1 to 5.2)††
Lifetime e-cigarette use<0.0001
  One or more puffs but never a whole one28.1 (25.8 to 30.4)16.4 (14.3 to 18.4)8.6 (6.5 to 10.7)
  1 to 1053.1 (50.1 to 56.0)52.4 (50.0 to 54.8)34.2 (30.8 to 37.7)
  11 to 2010.4 (8.8 to 12.0)15.9 (13.8 to 18.0)15.5 (13.1 to 17.9)
  21 to 505.5 (4.2 to 6.8)9.4 (7.4 to 11.3)16.5 (13.4 to 19.5)
  51 to 991.4 (0.7 to 2.1)2.6 (1.6 to 3.6)8.4 (6.0 to 10.8)
  100 or more1.5 (0.9 to 2.2)3.3 (2.2 to 4.4)16.8 (13.5 to 20.2)
Use e-cigarettes as a way of cutting down on cigarette smoking<0.0001
  Yes58.2 (55.1 to 61.4)81.8 (79.1 to 84.6)88.7 (85.6 to 91.7)
Rechargeable<0.0001
  Yes58.6 (55.8 to 61.4)78.0 (75.3 to 80.6)91.6 (89.5 to 93.7)
Use of cartridges§§<0.0001
  Yes71.0 (68.0 to 74.0)61.5 (57.9 to 65.2)42.3 (37.2 to 47.3)
Refillable<0.0001
  Yes32.4 (29.2 to 35.5)51.4 (47.7 to 55.2)73.6 (69.7 to 77.5)
  • p-Values for frequency of use categories from χ2 test. Frequencies reflect unweighted data and percentage-weighted data.

  • *Those who reported using an e-cigarette ‘every day’ or ‘some days’.

  • †Those who responded using an e-cigarette some days and reported using an e-cigarette on 0 to 2 of the past 30 days.

  • ‡Those who responded using an e-cigarette some days and reported using an e-cigarette on more than two of the past 30 days.

  • §Those who reported using e-cigarettes every day.

  • ¶Time since first use of an e-cigarette was calculated by subtracting age at which respondent reported first used an e-cigarette, even one or two times, from current age.

  • **Number of e-cigarette cartridges used on average each day was asked of established daily e-cigarette users.

  • ††Indicates questions not applicable for e-cigarette user subgroup.

  • ‡‡Estimate was suppressed; the relative SE was >30%.

  • §§Use of cartridges was asked among respondents who reported using a product that was rechargeable.

  • PATH, Population Assessment of Tobacco and Health.