Weighted sample characteristics
| Canada (n=1374) | UK (n=1325) | Australia (n=855) | USA (n=1144) | |
| % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | |
| Gender | ||||
| Male | 53.63 (50.33 to 56.92) | 50.98 (47.34 to 54.62) | 53.46 (49.18 to 57.74) | 54.46 (50.15 to 58.77) |
| Female | 46.36 (43.07 to 49.66) | 49.01 (45.37 to 52.65) | 46.53 (42.25 to 50.81) | 45.53 (41.22 to 49.84) |
| Age (at recruitment) | ||||
| 18–24 | 8.84 (6.29 to 11.39) | 13.21 (9.45 to 16.96) | 11.32 (8.09 to 14.55) | 10.50 (6.93 to 14.08) |
| 25–39 | 32.98 (29.60 to 36.35) | 32.80 (29.21 to 36.39) | 35.95 (31.43 to 40.48) | 31.46 (26.57 to 36.35) |
| 40–54 | 36.55 (33.50 to 39.60) | 30.95 (28.02 to 33.87) | 34.79 (31.02 to 38.56) | 35.37 (31.60 to 39.14) |
| 55 and older | 21.61 (19.29 to 23.94) | 23.02 (20.60 to 25.45) | 17.91 (15.18 to 20.64) | 22.65 (19.95 to 25.35) |
| Marital status | ||||
| Married | 62.80 (59.60 to 66.00) | 52.38 (48.71 to 56.05) | 59.77 (55.57 to 63.96) | 54.75 (50.24 to 59.25) |
| Separated/divorced | 11.36 (9.64 to 13.08) | 16.13 (13.96 to 18.30) | 15.79 (12.98 to 18.59) | 15.63 (12.84 to 18.41) |
| Widowed | 4.02 (3.01 to 5.03) | 4.77 (3.72 to 5.81) | 2.32 (1.39 to 3.25) | 5.85 (4.27 to 7.43) |
| Single | 21.80 (18.84 to 24.75) | 26.70 (22.95 to 30.45) | 22.11 (18.40 to 25.82) | 23.76 (19.19 to 28.33) |
| Ethnicity | ||||
| White, English only | 91.14 (89.10 to 93.17) | 94.76 (92.94 to 96.59) | 90.73 (88.32 to 93.15) | 83.22 (80.26 to 86.19) |
| Non-white, non-English | 8.85 (6.82 to 10.89) | 5.23 (3.40 to 7.05) | 9.26 (6.84 to 11.67) | 16.77 (13.80 to 19.73) |
| Income | ||||
| Low | 18.48 (16.07 to 20.88) | 25.89 (22.92 to 28.87) | 22.46 (18.91 to 26.00) | 29.96 (26.16 to 33.75) |
| Moderate | 37.04 (33.76 to 40.31) | 30.55 (27.29 to 33.81) | 29.38 (25.44 to 33.33) | 31.37 (27.30 to 35.44) |
| High | 37.66 (34.39 to 40.94) | 34.84 (31.14 to 38.55) | 41.99 (37.67 to 46.31) | 31.52 (27.07 to 35.97) |
| Unknown | 6.80 (5.28 to 8.33) | 8.70 (6.78 to 10.61) | 6.15 (4.29 to 8.01) | 7.13 (4.95 to 9.31) |
| Education | ||||
| Low | 40.86 (37.57 to 44.14) | 54.92 (51.25 to 58.58) | 60.13 (55.80 to 64.46) | 39.20 (34.99 to 43.40) |
| Moderate | 38.86 (35.59 to 42.12) | 26.07 (22.92 to 29.22) | 25.13 (21.10 to 29.15) | 37.32 (33.01 to 41.63) |
| High | 20.27 (17.54 to 23.00) | 19.00 (15.93 to 22.07) | 14.73 (11.74 to 17.71) | 23.47 (19.35 to 27.60) |
| Smoking status (at recruitment) | ||||
| Daily smoker | 93.45 (91.68 to 95.22) | 94.75 (93.19 to 96.31) | 90.26 (87.51 to 93.01) | 92.47 (90.02 to 94.91) |
| Non-daily smoker | 6.54 (4.77 to 8.31) | 5.24 (3.68 to 6.80) | 9.73 (6.98 to 12.48) | 7.52 (5.08 to 9.97) |
| Smoking status (at wave 7) | ||||
| Current smoker | 90.22 (88.11 to 92.32) | 90.99 (88.82 to 93.17) | 89.75 (87.06 to 92.45) | 91.13 (88.52 to 93.74) |
| Former smoker | 9.77 (7.67 to 11.88) | 9.00 (6.82 to 11.17) | 10.24 (7.54 to 12.93) | 8.86 (6.25 to 11.47) |
| Exposure to price promotions | ||||
| Exposed at either wave 7 or wave 8 | 23.14 (20.21 to 26.06) | 25.02 (21.83 to 28.22) | 17.97 (14.87 to 21.07) | 31.66 (27.39 to 35.94) |
| Exposed at waves 7 and 8 | 8.83 (6.92 to 10.73) | 15.73 (13.02 to 18.45) | 11.13 (7.92 to 14.33) | 54.47 (50.03 to 58.91) |
| Not exposed at either wave 7 or 8 | 68.02 (64.83 to 71.21) | 59.23 (55.61 to 62.84) | 70.89 (66.88 to 74.90) | 13.85 (11.24 to 16.46) |
Missing values for all sample characteristics were under 0.5% (ranging from n=0 for gender, age and smoking status at recruitment to n=22 for exposure to price promotions) except for smoking status at wave 7 (n=477, 10.1%). Participants who failed to report their smoking status at wave 7 were treated as missing.
n=4698.