Table 3.
Factors associated with current smoking in Thailand in bivariate and multivariate logistic regression analysis
| Characteristic | Current smoking (%, n) | Unadjusted Odds ratio (95% CIa) | Adjusted OR (95% CI) |
| Age (years) | |||
| 11–12 | 20.0 (2144) | 1.00 | 1.00 |
| 13 | 9.6 (4154) | 0.42 [0.32, 0.56] | 0.49 [0.36, 0.66] |
| 14 | 13.6 (5226) | 0.63 [0.44, 0.90] | 0.56 [0.40, 0.79] |
| 15 | 12.0 (3806) | 0.54 [0.38, 0.77] | 0.59 [0.41, 0.86] |
| 16–17 | 15.8 (1214) | 0.75 [0.50, 1.13] | 0.75 [0.47, 1.20] |
| Gender | |||
| Female | 5.2 (9089) | 1.00 | 1.00 |
| Male | 22.0 (9279) | 5.17 [4.08, 6.54] | 3.64 [2.72, 4.86] |
| Parental smoking status | |||
| None | 9.6 (9648) | 1.00 | 1.00 |
| One or both parents smokers | 17.3 (8805) | 1.98 [1.56, 2.53] | 1.62 [1.25, 2.11] |
| Best friends smokers | |||
| None | 4.0 (9445) | 1.00 | 1.00 |
| Some | 15.7 (7664) | 4.44 [3.12, 6.32] | 5.07 [3.54, 7.25] |
| Most or all | 53.5 (1627) | 27.45 [18.40, 40.96] | 26.71 [18.26, 39.06] |
| Perception that smoking is harmful | |||
| No | 27.7 (2362) | 1.00 | 1.00 |
| Yes | 11.5 (16309) | 0.34 [0.25, 0.47] | 0.47 [0.33, 0.66] |
aCI = Confidence Interval