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Table 2 Associations between exposure to e-cigarette use in others and past quit attempts, high motivation to stop smoking and prospective quit attempts

From: Are smokers who are regularly exposed to e-cigarette use by others more or less motivated to stop or to make a quit attempt? A cross-sectional and longitudinal survey

  Past quit attempts (n = 12,787) High motivation to stop smoking (n = 12,787) Prospective quit attempts (n = 1580)
% [95% CI] RRadj [95% CI] p % [95% CI] RRadj [95% CI] p % [95% CI] RRadj [95% CI] p
Exposure to e-cigarette use by others
 No 26.8 [25.9–27.7] 1.00 14.2 [13.6–15.0] 1.00 31.3 [28.7–34.0] 1.00
 Yes 32.3 [30.8–33.9] 0.97 [0.89–1.06] 0.546 16.6 [15.4–17.9] 0.99 [0.88–1.11] 0.839 34.4 [29.9–39.2] 0.94 [0.74–1.20] 0.627
Age
 16–24 29.8 [28.0–31.6] 1.00 13.6 [12.3–15.0] 1.00 38.3 [31.7–45.4] 1.00
 25–34 33.1 [31.3–35.0] 1.10 [0.98–1.24] 0.094 17.1 [15.6–18.6] 1.24 [1.06–1.45] 0.007 40.1 [33.7–46.9] 1.05 [0.72–1.53] 0.783
 35–44 32.0 [30.0–34.0] 1.05 [0.93–1.19] 0.430 18.6 [17.0–20.4] 1.34 [1.14–1.57] < 0.001 35.7 [29.7–42.3] 0.91 [0.62–1.33] 0.626
 45–54 27.0 [25.1–28.9] 0.89 [0.79–1.01] 0.067 16.4 [14.9–18.0] 1.17 [0.99–1.37] 0.066 35.2 [30.2–40.5] 0.92 [0.65–1.30] 0.629
 55–64 24.9 [23.0–26.9] 0.83 [0.73–0.95] 0.006 13.2 [11.8–14.8] 0.96 [0.80–1.15] 0.652 25.5 [21.1–30.6] 0.67 [0.47–0.97] 0.035
 65+ 20.1 [18.3–22.0] 0.71 [0.62–0.82] < 0.001 9.1 [7.8–10.5] 0.68 [0.56–0.83] < 0.001 24.1 [19.7–29.2] 0.65 [0.45–0.96] 0.028
Sex
 Men 26.9 [25.8–27.9] 1.00 13.7 [12.9–14.6] 1.00 31.7 [28.6–35.0] 1.00
 Women 29.8 [28.6–31.0] 1.10 [1.02–1.19] 0.012 16.2 [15.3–17.1] 1.16 [1.05–1.28] 0.003 32.5 [29.2–35.9] 1.02 [0.83–1.24] 0.877
Social grade
 ABC1 29.8 [28.5–31.0] 1.00 16.7 [15.8–17.8] 1.00 34.6 [31.2–38.3] 1.00
 C2DE 27.2 [26.2–28.2] 0.93 [0.86–1.00] 0.053 13.6 [12.8–14.4] 0.83 [0.75–0.91] < 0.001 30.1 [27.2–33.2] 0.87 [0.71–1.07] 0.175
Exposure to cigarette smoking by others
 No 27.8 [26.4–29.1] 1.00 15.7 [14.6–16.8] 1.00 29.7 [26.1–33.6] 1.00
 Yes 28.5 [27.5–29.4] 0.99 [0.91–1.08] 0.777 14.4 [13.7–15.2] 0.89 [0.80–0.99] 0.033 33.4 [30.6–36.4] 1.05 [0.83–1.31] 0.703
Own e-cigarette use
 No 23.0 [22.2–23.8] 1.00 12.4 [11.8–13.1] 1.00 29.2 [26.8–31.8] 1.00
 Yes 49.8 [47.8–51.7] 2.14 [1.97–2.33] < 0.001 25.0 [23.3–26.7] 1.95 [1.75–2.18] < 0.001 42.8 [37.6–48.1] 1.44 [1.14–1.83] 0.002
Survey year 1.00 [0.97–1.04] 0.925 1.02 [0.97–1.07] 0.425 0.95 [0.76–1.19] 0.537
  1. RR risk ratio, CI confidence interval
  2. Assessed with the question: ‘Are you using any of the following either to help you stop smoking, to help you cut down or for any other reason at all?’