Knowledge of health risks (percentage of participants giving a score of 0 or 100) by data collection time (for all participants and excluding participants unexposed to new warnings at time 2)
| Time 1 (n=1985) | Time 1 vs time 2—including all participants at time 2 | Time 1 vs time 2—only including participants exposed to new warnings at time 2 | ||||
| Time 2 (n=1572) | Time 2 | |||||
| % giving a score of 0 | % giving a score of 100 | % giving a score of 0 | % giving a score of 100 | % giving a score of 0 | % giving a score of 100 | |
| Warning 1: ‘pancreatic cancer’ | 4 | 24 | 3 | 25 | 3 | 28 |
| Warning 2: ‘miscarriage’ | 1 | 50 | 1 | 48 | 1 | 51 |
| Warning 3: ‘death’ | 5 | 25 | 3 | 23 | 3 | 25 |
| Warning 4: ‘secondhand smoke’ | 2 | 31 | 1 | 27 | 1 | 30 |
| Warning 5: ‘heart disease’ | 1 | 41 | 1 | 39 | 1 | 42 |
| Warning 6: ‘anxiety’ | 11 | 25 | 7 | 25 | 6 | 28 |
Values are % of participants giving a score of 0 (‘strongly disagree’) or 100 (‘strongly agree’) for the 6 new warnings.