Adjusted* OR and 95% CI for the effect of covariates on SID (n=4297 person-waves)
| Adjusted OR | p Value | Adjusted OR | p Value | |
| Price paid per cigarette (Mex$) | 0.94 (0.81 to 1.10) | 0.441 | – | |
| Cigarette expenditure (Mex$) | – | 1.02 (1.01 to 1.04) | <0.001 | |
| Discounted cigarettes | ||||
| Yes | 2.01 (1.54 to 2.64) | <0.001 | 1.93 (1.47 to 2.54) | <0.001 |
| No | 1.00 | 1.00 | ||
| No of cigarettes smoked per day | ||||
| Less than five | 0.59 (0.49 to 0.71) | <0.001 | 0.74 (0.60 to 0.91) | 0.004 |
| Five or more | 1.00 | 1.00 | ||
| Daily smoker | ||||
| Yes | 1.52 (1.23 to 1.87) | <0.001 | 1.43 (1.16 to 1.77) | 0.001 |
| No | 1.00 | 1.00 | ||
| No of friends who smoke | 1.00 (0.95 to 1.04) | 0.950 | 1.00 (0.95 to 1.04) | 0.875 |
| Sex | ||||
| Male | 1.00 | 0.029 | 1.00 | 0.017 |
| Female | 1.20 (1.02 to 1.42) | 1.22 (1.04 to 1.44) | ||
| Age | 0.99 (0.99 to 1.00) | 0.004 | 0.99 (0.99 to 1.00) | 0.004 |
| Income | ||||
| Low | 1.00 | <0.001 | 1.00 | 0.001 |
| Medium | 0.77 (0.64 to 0.92) | 0.77 (0.64 to 0.92) | ||
| High | 0.72 (0.56 to 0.93) | 0.72 (0.56 to 0.92) | ||
| No information | 0.55 (0.40 to 0.77) | 0.55 (0.40 to 0.77) | ||
| Education | ||||
| Low | 1.00 | <0.001 | 1.00 | <0.001 |
| Medium | 0.74 (0.62 to 0.90) | 0.74 (0.62 to 0.90) | ||
| High | 0.58 (0.44 to 0.77) | 0.59 (0.44 to 0.77) | ||
| Year | ||||
| 2008 | 0.76 (0.62 to 0.92) | <0.001 | 0.81 (0.67 to 0.97) | <0.001 |
| 2010 | 1.16 (0.98 to 1.39) | 1.22 (1.03 to 1.45) | ||
| 2011 | 1.00 | 1.00 | ||
| City | ||||
| Tijuana | 0.27 (0.19 to 0.38) | <0.001 | 0.25 (0.18 to 0.36) | <0.001 |
| Mexico City | 1.00 | 1.00 | ||
| Guadalajara | 0.96 (0.74 to 1.24) | 0.97 (0.75 to 1.26) | ||
| Monterrey | 1.41 (1.11 to 1.79) | 1.33 (1.05 to 1.69) | ||
| Puebla | 1.67 (1.31 to 2.13) | 1.66 (1.30 to 2.11) | ||
| Mérida | 0.62 (0.47 to 0.82) | 0.59 (0.45 to 0.79) | ||
↵* Adjusted for all covariates. Price and expenditure are included in separate models.
SID, smoking-induced deprivation.