Logistic regression of the belief that “my usual brand is less harmful”: International Tobacco Control (ITC) China wave 3
| Factor | n | My brand less harmful (%)*† | Adjusted OR (95% CI) | p Value |
|---|---|---|---|---|
| Demographic variables | ||||
| Gender | ||||
| Male | 1419 | 28.1 | 1.00 (reference) | |
| Female | 87 | 31.8 | 1.08 (0.83 to 1.41) | 0.57 |
| Age (years) | ||||
| 18–39 | 232 | 18.8 | 1.00 (reference) | |
| 40–54 | 697 | 29.2 | 1.79 (1.41 to 2.28) | <0.001 |
| 55+ | 577 | 32.9 | 2.11 (1.71 to 2.61) | <0.001 |
| Ethnicity | ||||
| Han | 1418 | 28.5 | 1.00 (reference) | |
| Other | 86 | 25.6 | 1.07 (0.82 to 1.39) | 0.64 |
| Income | ||||
| Low | 132 | 26.3 | 0.87 (0.65 to 1.18) | 0.38 |
| Medium | 573 | 27.3 | 0.91 (0.74 to 1.12) | 0.38 |
| High | 714 | 29.4 | 1.00 (reference) | |
| Don’t Know/Refused | 84 | 28.1 | 1.12 (0.77 to 1.62) | 0.56 |
| Education | ||||
| Low | 173 | 30.4 | 1.01 (0.74 to 1.37) | 0.95 |
| Medium | 965 | 27.9 | 0.89 (0.73 to 1.07) | 0.22 |
| High | 365 | 28.0 | 1.00 (reference) | |
| Smoking behaviour | ||||
| Every day | 1418 | 28.1 | 0.96 (0.64 to 1.43) | 0.83 |
| Some days | 88 | 31.6 | 1.00 (reference) | |
| Cigarettes per day | ||||
| 0–10 | 630 | 30.6 | 1.00 (reference) | |
| 11–20 | 663 | 26.7 | 0.88 (0.72 to 1.06) | 0.18 |
| 21–30 | 127 | 27.3 | 0.92 (0.63 to 1.35) | 0.67 |
| 31+ | 86 | 28.3 | 0.95 (0.63 to 1.43) | 0.80 |
| Health knowledge | ||||
| 0 | 151 | 26.5 | 1.01 (0.98 to 1.03)‡ | 0.71 |
| 1 | 55 | 29.8 | ||
| 2 | 80 | 26.3 | ||
| 3 | 78 | 24.0 | ||
| 4 | 116 | 30.4 | ||
| 5 | 126 | 28.8 | ||
| 6 | 138 | 25.8 | ||
| 7 | 148 | 29.3 | ||
| 8 | 150 | 30.2 | ||
| 9 | 119 | 25.0 | ||
| 10 | 156 | 30.6 | ||
| 11 | 188 | 30.2 | ||
| Current brand | ||||
| ‘Regular’ | 168 | 16.1 | 1.00 (reference) | |
| ‘Light/low tar’ | 1291 | 32.7 | 2.42 (1.93 to 3.04) | <0.001 |
| Don't know | 44 | 13.6 | 0.82 (0.54 to 1.24) | 0.34 |
| Health Concern | ||||
| Worried smoking has damaged health | ||||
| Very much | 204 | 26.4 | 0.87 (0.63 to 1.17) | 0.34 |
| A little | 795 | 28.9 | 0.92 (0.75 to 1.13) | 0.43 |
| Not at all/don’t know | 498 | 28.0 | 1.00 (reference) | |
| Worried smoking will damage health | ||||
| Very much | 305 | 27.7 | 1.29 (0.94 to 1.77) | 0.11 |
| A little | 765 | 30.3 | 1.37 (1.12 to 1.67) | 0.002 |
| Not at all/don’t know | 430 | 25.3 | 1.00 (reference) | |
| Describe your health | ||||
| 1 Poor | 38 | 31.6 | 1.00 (reference) | |
| 2 | 76 | 27.3 | 0.80 (0.44 to 1.45) | 0.46 |
| 3 | 689 | 27.4 | 0.78 (0.49 to 1.24) | 0.30 |
| 4 | 481 | 28.5 | 0.82 (0.50 to 1.35) | 0.43 |
| 5 Excellent | 213 | 30.3 | 0.90 (0.55 to 1.47) | 0.67 |
| Perceived addiction | ||||
| Not at all | 180 | 32.8 | 1.00 (reference) | |
| A little | 806 | 28.5 | 0.84 (0.63 to 1.12) | 0.24 |
| Somewhat | 389 | 27.7 | 0.86 (0.64 to 1.14) | 0.28 |
| A lot | 129 | 24.0 | 0.70 (0.45 to 1.08) | 0.10 |
| My brand smoother | ||||
| Agree/strongly agree | 1239 | 44.7 | 6.86 (5.64 to 8.33) | <0.001 |
| Disagree/strongly Disagree/neither/don't know | 264 | 10.1 | 1.00 (reference) | |
Response options for my brand less harmful ‘a little less’ n=1473 and ‘no different/a little more’ n=3588.
*Controlling for city.
†The belief prevalences presented for each response category of each factor are not adjusted for the other predictor variables in the model. These prevalences and the reported sample sizes represent the respondents who endorsed the belief that their brand is less harmful in each category.
‡Continuous variable.