Table 2.
Online e-cigarette information exposure and its influencing factors (N = 708,765).
| Social Media Exposure | Website Exposure | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| %(95%CI) | cOR(95%CI) a,b | p | aOR(95%CI) a,c | p | %(95%CI) | cOR(95%CI) a,b | p | aOR(95%CI) a,c | p | |
| Gender | ||||||||||
| Male | 18.3 (17.3–19.2) | Ref = 1 | Ref = 1 | 17.9 (17.0–18.9) | Ref = 1 | Ref = 1 | ||||
| Female | 18.9 (17.9–19.9) | 1.04 (0.94–1.14) | 0.450 | 1.14 (1.03–1.26) | 0.012 | 18.2 (17.2–19.2) | 1.02 (0.93–1.13) | 0.670 | 1.11 (1.00–1.23) | 0.047 |
| School type | ||||||||||
| Junior high school | 16.8 (15.9–17.8) | Ref = 1 | Ref = 1 | 16.2 (15.3–17.2) | Ref = 1 | Ref = 1 | ||||
| Senior high school | 18.8 (17.5–20.3) | 1.15 (1.02–1.28) | 0.019 | 0.92 (0.81–1.05) | 0.229 | 19.0 (17.7–20.5) | 1.21 (1.08–1.36) | 0.001 | 0.97 (0.85–1.11) | 0.691 |
| Vocational high school | 24.6 (23.4–25.8) | 1.61 (1.46–1.77) | <0.001 | 1.16 (1.01–1.33) | 0.031 | 23.4 (22.2–24.6) | 1.58 (1.43–1.73) | <0.001 | 1.10 (0.96–1.27) | 0.165 |
| Boarding in school | ||||||||||
| No | 18.1 (17.3–18.8) | Ref = 1 | Ref = 1 | 17.4 (16.7–18.2) | Ref = 1 | Ref = 1 | ||||
| Yes | 21.3 (19.9–22.9) | 1.23 (1.11–1.37) | <0.001 | 0.92 (0.80–1.05) | 0.214 | 21.6 (20.1–23.1) | 1.30 (1.17–1.45) | <0.001 | 1.00 (0.87–1.15) | 0.979 |
| Residence | ||||||||||
| Local | 18.7 (17.9–19.6) | Ref = 1 | Ref = 1 | 18.2 (17.3–19.0) | Ref = 1 | Ref = 1 | ||||
| Non-local | 18.2 (17.0–19.4) | 0.96 (0.87–1.06) | 0.460 | 0.97 (0.87–1.08) | 0.560 | 17.7 (16.6–19.0) | 0.97 (0.88–1.07) | 0.568 | 0.98 (0.87–1.09) | 0.670 |
| Monthly allowance | ||||||||||
| <200 RMB (<31.5 USD) | 15.9 (15.0–16.8) | Ref = 1 | Ref = 1 | 15.4 (14.6–16.3) | Ref = 1 | Ref = 1 | ||||
| 200–599 RMB (31.5–94.5 USD) | 21.2 (19.9–22.6) | 1.42 (1.28–1.58) | <0.001 | 1.29 (1.14–1.45) | <0.001 | 20.5 (19.2–21.8) | 1.41 (1.27–1.57) | <0.001 | 1.28 (1.13–1.44) | <0.001 |
| ≥600 RMB (≥94.5 USD) | 25.1 (23.2–27.0) | 1.77 (1.57–2.00) | <0.001 | 1.44 (1.23–1.67) | <0.001 | 24.6 (22.7–26.5) | 1.78 (1.58–2.02) | <0.001 | 1.45 (1.24–1.68) | <0.001 |
| School performance | ||||||||||
| Top 25% | 17.3 (16.1–18.5) | Ref = 1 | Ref = 1 | 17.5 (16.3–18.7) | Ref = 1 | Ref = 1 | ||||
| Average | 19.1 (18.0–20.2) | 1.13 (1.01–1.26) | 0.026 | 1.11 (0.99–1.24) | 0.082 | 18.1 (17.1–19.2) | 1.05 (0.94–1.17) | 0.404 | 1.02 (0.91–1.14) | 0.740 |
| Bottom 25% | 19.5 (18.1–21.0) | 1.16 (1.03–1.31) | 0.015 | 1.08 (0.95–1.23) | 0.251 | 18.7 (17.3–20.1) | 1.08 (0.96–1.23) | 0.196 | 1.00 (0.88–1.14) | 0.981 |
| Friends’ e-cigarette use | ||||||||||
| No | 15.7 (15.0–16.4) | Ref = 1 | Ref = 1 | 15.3 (14.6–16.1) | Ref = 1 | Ref = 1 | ||||
| Yes | 31.4 (29.6–33.3) | 2.46 (2.23–2.73) | <0.001 | 2.08 (1.85–2.34) | <0.001 | 30.1 (28.4–32.0) | 2.38 (2.15–2.64) | <0.001 | 1.97 (1.75–2.23) | <0.001 |
| Parents’ e-cigarette use | ||||||||||
| No | 18.1 (17.3–18.8) | Ref = 1 | Ref = 1 | 17.5 (16.8–18.2) | Ref = 1 | Ref = 1 | ||||
| Yes | 23.1 (20.8–25.7) | 1.37 (1.18–1.58) | <0.001 | 1.09 (0.93–1.28) | 0.307 | 23.0 (20.6–25.5) | 1.41 (1.21–1.63) | <0.001 | 1.15 (0.98–1.35) | 0.077 |
| E-cigarette curiosity | ||||||||||
| No | 16.6 (15.8–17.3) | Ref = 1 | Ref = 1 | 16.1 (15.4–16.8) | Ref = 1 | Ref = 1 | ||||
| Yes | 27.3 (25.5–29.1) | 1.89 (1.70–2.10) | <0.001 | 1.52 (1.35–1.72) | <0.001 | 26.5 (24.7–28.3) | 1.88 (1.69–2.09) | <0.001 | 1.51 (1.34–1.71) | <0.001 |
| Traditional smoking status | ||||||||||
| Never | 17.6 (16.9–18.4) | Ref = 1 | Ref = 1 | 17.2 (16.2–17.9) | Ref = 1 | Ref = 1 | ||||
| Ever | 28.5 (24.8–32.5) | 1.87 (1.54–2.27) | <0.001 | 1.43 (1.15–1.77) | <0.001 | 27.0 (23.4–30.9) | 1.78 (1.46–2.17) | <0.001 | 1.35 (1.08–1.68) | 0.005 |
| Current | 44.9 (36.4–53.6) | 3.80 (2.67–5.43) | <0.001 | 2.00 (1.31–3.05) | <0.001 | 42.2 (33.9–51.1) | 3.53 (2.46–5.06) | <0.001 | 1.85 (1.21–2.83) | 0.008 |
| E-cigarette use | ||||||||||
| Never | 18.0 (17.3–18.8) | Ref = 1 | Ref = 1 | Ref = 1 | Ref = 1 | |||||
| Ever | 31.9 (24.6–40.2) | 2.13 (1.47–3.07) | <0.001 | 0.85 (0.56–1.29) | 0.458 | 2.28 (1.58–3.27) | 2.28 (1.58–3.27) | <0.001 | 0.97 (0.64–1.48) | 0.904 |
| Current | 42.7 (32.9–53.1) | 3.38 (2.22–5.16) | <0.001 | 0.98 (0.60–1.58) | 0.923 | 3.01 (1.96–4.61) | 3.01 (1.96–4.61) | <0.001 | 0.92 (0.57–1.51) | 0.754 |
| Total | 18.6 (17.9–19.3) | 18.0 (17.3–18.7) | ||||||||
a compared with no exposure; b cOR stands for crude odds ratio; c model adjusted for gender, school type, boarding in school, residence, school performance, monthly allowance, friends’ e-cigarette use, parents’ e-cigarette use, e-cigarette curiosity, traditional smoking status, and e-cigarette use.