Bivariate and multivariate adjusted logistic models for buying single cigarettes at last cigarette purchase
| Independent variables | Bivariate OR (95% CI) | Multivariate OR (95% CI) | |
| Sex | |||
| Female | 1 | 1 | |
| Male | 0.83 (0.48 to 1.44) | 0.76 (0.42 to 1.39) | |
| Age | |||
| 18–24 | 1 | 1 | |
| 25–39 | 0.59 (0.29 to 1.20) | 1.01 (0.43 to 2.37) | |
| 40–54 | 0.27 (0.12 to 0.64)† | 0.47 (0.16 to 1.39) | |
| 55+ | 0.34 (0.13 to 0.93)* | 0.77 (0.26 to 2.26) | |
| Education | |||
| < Middle school | 1 | 1 | |
| Middle school | 0.98 (0.47 to 2.07) | 1.02 (0.38 to 2.73) | |
| High school | 0.61 (0.28 to 1.31) | 0.75 (0.33 to 1.71) | |
| > High school | 0.26 (0.08 to 0.90)* | 0.29 (0.08 to 1.13) | |
| Income (pesos/month) | |||
| 0–3000 | 1 | 1 | |
| 3001–5000 | 0.52 (0.26 to 1.02) | 0.41 (0.17 to 0.97)* | |
| 5001–8000 | 0.45 (0.21 to 0.98)* | 0.44 (0.17 to 1.12) | |
| 8001 or more | 0.41 (0.26 to 0.65)§ | 0.47 (0.25 to 0.88)* | |
| Regularity of smoking | |||
| Daily | 1 | 1 | |
| Non-daily | 2.52 (1.48 to 4.26)‡ | 2.52 (1.31 to 4.81)† | |
| Quit attempt in last year | |||
| No | 1 | 1 | |
| Yes | 1.57 (0.97 to 2.55) | 0.91 (0.40 to 2.05) | |
| Intention to quit in next 6 months | |||
| No | 1 | 1 | |
| Yes | 3.00 (1.56 to 5.78)‡ | 2.29 (1.17 to 4.48)* | |
| Frequency of buying single cigarettes to reduce consumption, last month | |||
| Never | 1 | 1 | |
| Once in a while | 6.72 (3.31 to 13.65)§ | 2.63 (0.90 to 7.71) | |
| Often/very often | 19.23 (8.28 to 44.69)§ | 16.08 (6.30 to 41.04)§ | |
| Cues to smoke after seeing single cigarettes for sale, last month | |||
| None | 1 | 1 | |
| Low | 4.00 (1.61 to 9.93)† | 2.92 (1.08 to 7.91)* | |
| Middle | 2.97 (1.46 to 6.04)† | 2.19 (0.92 to 5.20) | |
| High | 3.64 (1.51 to 8.77)† | 1.91 (0.68 to 5.39) |
*p<0.05; †p<0.01; ‡p<0.001; §p<0.0001.