Multivariate lineal regression model for adjusted cigarette price at last purchase
| Explanatory variables | Packs (n=6457) | Single cigarettes (n=5978) | ||
| Coefficient (β) | 95% CI | Coefficient (β) | 95% CI | |
| Year | ||||
| 2011 | Ref. | Ref. | ||
| 2009 | −0.27** | (−0.35 to −0.20) | −0.29 | (−0.70 to 0.12) |
| 2015 | 0.34** | (0.25 to 0.43) | 0.39 | (−0.03 to 0.81) |
| 2016 | 0.30** | (0.22 to 0.37) | 0.68** | (0.45 to 0.92) |
| Brand | ||||
| Marlboro | Ref. | Ref. | ||
| Camel | 0.11 | (−0.02 to 0.23) | 0.09 | (−0.16 to 0.33) |
| Montana | −0.29** | (−0.44 to −0.13) | −0.39 | (−1.36 to 0.59) |
| Pall Mall | −0.34** | (−0.49 to −0.19) | −0.31 | (−0.89 to 0.27) |
| Benson & Hedges | 0.07 | (−0.06 to 0.19) | 1.66 | (−0.34 to 3.67) |
| Delicados | −0.43** | (−0.56 to −0.30) | −0.65* | (−1.15 to −0.16) |
| Others | −0.62** | (−0.76 to −0.46) | −1.06* | (−1.66 to −0.45) |
Lineal regression model stratified by type of purchase and adjusted by year (2011 as the reference), and cigarette brand.
*p<0.05.
**p<0.001.