Individual-level factors associated with intentions to quit smoking
| n | Intention to quit(%) | Univariate analysis | Multivariate analysis | |||
| OR | 95% CI | OR | 95% CI | |||
| Gender | ||||||
| Female | 232 | 25.3 | Reference | Reference | ||
| Male | 4481 | 24.3 | 0.95 | 0.56 to 1.61 | 0.81 | 0.43 to 1.54 |
| Age | ||||||
| 18–24 | 66 | 29.6 | Reference | Reference | ||
| 25–39 | 828 | 25.4 | 0.81 | 0.41 to 1.61 | 0.95 | 0.43 to 2.11 |
| 40–54 | 2330 | 24.6 | 0.77 | 0.35 to 1.69 | 1.08 | 0.44 to 2.64 |
| ≥55 | 1489 | 23.2 | 0.72 | 0.35 to 1.46 | 0.94 | 0.40 to 2.23 |
| Household income per month | ||||||
| Low (<¥1000) | 923 | 22.8 | Reference | Reference | ||
| Medium (¥1000–3000) | 2125 | 25.6 | 1.17 | 0.92 to 1.47 | 1.13 | 0.87 to 1.47 |
| High (≥¥3000) | 1323 | 25.5 | 1.16 | 0.87 to 1.54 | 1.29 | 0.94 to 1.77 |
| Don't know | 339 | 16.6 | 0.67 | 0.46 to 0.99 | 0.92 | 0.55 to 1.57 |
| Education | ||||||
| Low | 619 | 19.1 | Reference | Reference | ||
| Medium | 3085 | 24.7 | 1.39 | 1.00 to 1.92 | 1.21 | 0.84 to 1.74 |
| High | 1004 | 27.3 | 1.60 | 1.10 to 2.32 | 1.29 | 0.83 to 1.98 |
| Tried to quit within last year | ||||||
| No | 3939 | 18.7 | Reference | Reference | ||
| Yes | 777 | 51.0 | 4.52 | 3.74 to 5.45 | 2.29 | 1.81 to 2.89 |
| Longest time quit smoking | ||||||
| Never quit | 2211 | 13.2 | Reference | Reference | ||
| Less than 1 month | 1027 | 32.7 | 3.19 | 2.70 to 3.78 | 1.34 | 1.04 to 1.71 |
| 1–6 months | 893 | 36.8 | 3.84 | 2.66 to 5.53 | 1.91 | 1.39 to 2.61 |
| 6 months or more | 548 | 34.5 | 3.46 | 2.67 to 4.49 | 2.19 | 1.64 to 2.92 |
| Don't know | 30 | 22.3 | 1.89 | 0.78 to 4.56 | 1.90 | 0.66 to 5.49 |
| HSI | ||||||
| 0–6 | 4381 | 0.83 | 0.79 to 0.88 | 0.87 | 0.82 to 0.93 | |
| Outcome expectancy of quitting (benefit from quitting in the next 6 months) | ||||||
| Not at all | 942 | 7.3 | Reference | Reference | ||
| A little | 1523 | 21.0 | 3.37 | 2.25 to 5.05 | 2.14 | 1.41 to 3.25 |
| Very much | 1608 | 43.3 | 9.71 | 6.33 to 14.87 | 3.84 | 2.44 to 6.04 |
| Don't know | 638 | 7.7 | 1.06 | 0.65 to 1.73 | 1.01 | 0.60 to 1.70 |
| Worried about health in the future | ||||||
| Not at all | 1634 | 8.5 | Reference | Reference | ||
| A little | 1976 | 27.3 | 4.05 | 3.04 to 5.40 | 2.04 | 1.58 to 2.62 |
| Very much | 853 | 49.5 | 10.59 | 7.96 to 14.09 | 3.36 | 2.32 to 4.88 |
| Don't know | 249 | 13.6 | 1.70 | 0.99 to 2.92 | 1.54 | 0.85 to 2.76 |
| Favourable attitudes about smoking | ||||||
| Neither disagree nor agree | 456 | 14.2 | Reference | Reference | ||
| Agree | 2591 | 23.0 | 1.81 | 1.19 to 2.75 | 2.01 | 1.08 to 3.74 |
| Disagree | 1584 | 30.0 | 2.60 | 1.77 to 3.81 | 2.09 | 1.18 to 3.71 |
| Overall opinion of smoking | ||||||
| Neither good nor bad | 1800 | 13.6 | Reference | Reference | ||
| Bad | 2480 | 34.9 | 3.42 | 2.87 to 4.07 | 1.70 | 1.33 to 2.16 |
| Good | 315 | 6.4 | 0.44 | 0.27 to 0.72 | 0.66 | 0.40 to 1.09 |
Bold values indicate a significant difference at p<0.05.
HSI, Heaviness of Smoking Index.