Weighted GEE model for self-reported price per cigarette at last purchase
| Explanatory variables | Coefficient (B) | 95% CI |
|---|---|---|
| Survey wave | ||
| 2008** | −0.26 | (−0.30 to −0.22) |
| 2011** | 0.31 | (0.27 to 0.34) |
| Brand of last cigarette purchase | ||
| National** | −0.48 | (−0.53 to −0.43) |
| Interactions | ||
| 2008_National** | 0.24 | (1.15 to 1.37) |
| 2011_National** | 0.16 | (0.09 to 0.24) |
| Form of last cigarette purchase | ||
| Pack of cigarettes | −1.35 | (−1.40 to −1.30) |
| Observations | 4563 | |
*p<0.05, **p<0.01.
GEE, generalised estimating equations.