| Time 1 (t1) % (n) | Time 2 (t2) % (n) | Test statistic |
---|---|---|---|
Health policy assignment | |||
 20% tax on sugary drinks | 25.0 (1500) | 24.9 (819) | Χ2(3) = 0.09, p = .992 |
 Removal of sugary drink sponsorship from sport | 25.0 (1500) | 25.0 (821) | |
 Volume-based tax on alcohol | 25.0 (1500) | 24.8 (815) | |
 Removal of alcohol sponsorship from sport | 25.0 (1500) | 25.3 (830) | |
Message condition | |||
 Control | 20.0 (1200) | 19.6 (644) | Χ2(4) = 0.32, p = .988 |
 Standard pro-policy arguments (Standard) | 20.0 (1200) | 20.3 (667) | |
 Standard + inoculation | 20.0 (1200) | 19.9 (655) | |
 Standard + narrative | 20.0 (1200) | 20.2 (664) | |
 Standard + inoculation + narrative | 20.0 (1200) | 19.9 (655) | |
Sex | |||
 Male | 40.8 (2446) | 42.2 (1386) | Χ2(1) = 1.78, p = .182 |
 Female | 59.2 (3554) | 57.8 (1899) | |
Age (years) | |||
 18–24 | 7.5 (450) | 5.9 (193) | Χ2(5) = 13.60, p = .018 |
 25–34 | 14.2 (853) | 13.4 (441) | |
 35–44 | 14.1 (847) | 13.6 (448) | |
 45–54 | 15.5 (929) | 15.3 (504) | |
 55–64 | 21.5 (1292) | 22.5 (739) | |
 65 and older | 27.2 (1629) | 29.2 (960) | |
SES (area-based) a | |||
 Quintile 1 (high disadvantage) | 16.2 (974) | 16.4 (539) | Χ2(4) = 1.34, p = .855 |
 Quintile 2 | 18.2 (1090) | 18.3 (602) | |
 Quintile 3 | 19.2 (1151) | 18.2 (598) | |
 Quintile 4 | 22.4 (1342) | 22.6 (743) | |
 Quintile 5 (low disadvantage) | 24.0 (1442) | 24.4 (802) | |
Highest level of education | |||
 Some secondary school or less | 12.4 (744) | 13.2 (433) | Χ2(4) = 1.34, p = .854 |
 Finished secondary school | 17.6 (1053) | 17.7 (582) | |
 Some tertiary education | 26.0 (1561) | 25.6 (840) | |
 Finished tertiary education | 29.5 (1768) | 29.1 (956) | |
 Higher degree/diploma | 14.6 (874) | 14.4 (474) | |
Parent/carer of child aged under 18 | |||
 No | 76.4 (4584) | 77.7 (2552) | Χ2(1) = 1.98, p = .160 |
 Yes | 23.6 (1416) | 22.3 (733) | |
Body mass index (BMI) category b | |||
 Underweight | 2.7 (139) | 2.5 (70) | Χ2(3) = 0.84, p = .839 |
 Healthy weight | 37.3 (1926) | 38.1 (1079) | |
 Overweight | 32.6 (1682) | 32.1 (907) | |
 Obese | 27.5 (1420) | 27.3 (773) | |
Consumed sugary drinks in past 7 days c | |||
 No | 48.4 (1453) | 50.6 (830) | Χ2(1) = 2.01, p = .156 |
 Yes | 51.6 (1547) | 49.4 (810) | |
Frequency of drinking alcohol in last 12 months d | |||
 Never / non-drinker | 16.1 (484) | 16.2 (267) | Χ2(2) = 0.16, p = .922 |
 2–3 days a month or less | 40.8 (1225) | 41.3 (680) | |
 At least 1–2 days a week | 43.0 (1291) | 42.4 (698) | |
Political ideology (1 = Left to 10 = Right) | |||
 Mean (sd) | 5.43 (1.93) | 5.44 (1.93) | F(1) = 0.09, p = .767 |