Interactions between cigarette packaging and labelling characteristics on outcomes
| Attractive (n=4245) | Interested in trying (n=4251) | Relative harm (n=4234) | |
| Coefficient (SE) | Coefficient (SE) | Coefficient (SE) | |
| Branding × flavour capsules | |||
| Normal | |||
| None | Reference | Reference | Reference |
| One capsule | 0.351 (0.026)*** | 0.269 (0.037)*** | −0.216 (0.062)*** |
| Two capsules | 0.455 (0.027)*** | 0.370 (0.037)*** | −0.109 (0.065) |
| Plain/generic | |||
| None | −1.397 (0.040)*** | −0.638 (0.047)*** | −0.070 (0.060) |
| One capsule | −1.491 (0.042)*** | −0.647 (0.045)*** | −0.104 (0.063) |
| Two capsules | −1.342 (0.043)*** | −0.634 (0.053)*** | −0.032 (0.068) |
| Overall p value | <0.001 | <0.001 | 0.0106 |
| Branding × tobacco flavour | |||
| Normal | |||
| Regular | Reference | Reference | Reference |
| Menthol | 0.233 (0.021)*** | 0.193 (0.029)*** | 0.064 (0.050) |
| Plain/generic | |||
| Regular | −1.592 (0.037)*** | −0.803 (0.045)*** | 0.072 (0.052) |
| Menthol | −1.558 (0.037)*** | −0.738 (0.040)*** | 0.070 (0.052) |
| Overall p value | <0.001 | <0.001 | 0.442 |
| Branding × descriptive terms/symbols | |||
| Normal | |||
| Present | Reference | Reference | Reference |
| Not present | −0.245 (0.023)*** | −0.201 (0.033)*** | 0.058 (0.054) |
| Plain/generic | |||
| Present | −1.722 (0.037)*** | −0.881 (0.042)*** | 0.107 (0.055) |
| Not present | −1.911 (0.039)*** | −1.057 (0.043)*** | 0.030 (0.058) |
| Overall p value | <0.001 | <0.001 | 0.200 |
| Branding × HWL size | |||
| Normal | |||
| 30% | Reference | Reference | Reference |
| 75% | −1.057 (0.027)*** | −0.569 (0.030)*** | 0.265 (0.050)*** |
| Plain/generic | |||
| 30% | −2.163 (0.038)*** | −1.119 (0.043)*** | 0.044 (0.060) |
| 75% | −2.192 (0.042)*** | −1.161 (0.047)*** | 0.300 (0.056)*** |
| Overall p value | <0.001 | <0.001 | <0.001 |
| HWL size × flavour capsules | |||
| 30% | |||
| None | Reference | Reference | Reference |
| One capsule | 0.436 (0.028)*** | 0.261 (0.039)*** | −0.192 (0.059)*** |
| Two capsules | 0.430 (0.030)*** | 0.303 (0.040)*** | −0.118 (0.069) |
| 75% | |||
| None | −0.492 (0.038)*** | −0.249 (0.044)*** | 0.170 (0.055)** |
| One capsule | −0.551 (0.037)*** | −0.188 (0.043)*** | 0.093 (0.057) |
| Two capsules | −0.294 (0.038)*** | −0.110 (0.051)* | 0.203 (0.064)*** |
| Overall p value | <0.001 | <0.001 | <0.001 |
| HWL size × tobacco flavour | |||
| 30% | |||
| Regular | Reference | Reference | Reference |
| Menthol | 0.190 (0.024)*** | 0.144 (0.032)*** | 0.030 (0.050) |
| 75% | |||
| Regular | −0.722 (0.034)*** | −0.375 (0.043)*** | 0.260 (0.053)*** |
| Menthol | −0.579 (0.031)*** | −0.235 (0.035)*** | 0.291 (0.050)*** |
| Overall p value | <0.001 | <0.001 | <0.001 |
| HWL size × descriptive term/symbol | |||
| 30% | |||
| Present | Reference | Reference | Reference |
| Not present | −0.325 (0.024)*** | −0.261 (0.030)*** | −0.033 (0.055) |
| 75% | |||
| Present | −0.859 (0.031)*** | −0.452 (0.035)*** | 0.237 (0.050)*** |
| Not present | −0.944 (0.032)*** | −0.553 (0.037)*** | 0.251 (0.052)*** |
| Overall p value | <0.001 | <0.001 | <0.001 |
| Flavour capsules × tobacco flavour | |||
| None | |||
| Regular | Reference | Reference | Reference |
| Menthol | −0.141 (0.036)*** | −0.003 (0.046) | 0.007 (0.060) |
| One capsule | |||
| Regular | −0.065 (0.032)* | 0.010 (0.041) | −0.144 (0.061)* |
| Menthol | 0.341 (0.032)*** | 0.307 (0.045)*** | −0.111 (0.064) |
| Two capsules | |||
| Regular | 0.159 (0.034)*** | 0.166 (0.043)*** | −0.060 (0.064) |
| Menthol | 0.327 (0.034)*** | 0.271 (0.043)*** | −0.007 (0.062) |
| Overall p value | <0.001 | <0.001 | 0.043 |
Interactions was assessed one block at a time in separate models and all models included main effects for other attributes (results not shown), the block of interaction terms and an alternative specific constant (not shown).
*p < .05; **p<0.01; ***p<0.001.
HWL, health warning label.