| Followed up | Not followed up | Total | |
| Phase 1 sample | |||
| Total (N) | 357 | 135 | 492 |
| From USA (N) | 256 | 86 | 342 |
| From Canada (N) | 44 | 16 | 60 |
| From France (N) | 31 | 14 | 45 |
| From UK (N) | 26 | 19 | 45 |
| Mean (SD) age (years) | 48.6 (8.1) | 48.7 (8.7) | 48.6 (8.3) |
| Married, % (N) | 52.4 (187) | 48.9 (66) | 51.4 (253) |
| Female, % (N) | 45.1 (161) | 48.1 (65) | 45.9 (226) |
| White, % (N)† | 90.5 (314) | 91.3 (115) | 90.7 (429) |
| Post secondary education, % (N)‡ | 73.7 (263) | 68.7 (92) | 72.3 (355) |
| Reporting health as “poor”, % (N) | 9.5 (34) | 8.9 (12) | 9.3 (46) |
| Smoking, % (N)§: | |||
| 5–10 cigs/day | 16.0 (57) | 17.0 (23) | 16.3 (80) |
| 11–15 cigs/day | 45.4 (162) | 45.2 (61) | 45.3 (223) |
| 16–20 cigs/day | 34.4 (123) | 34.8 (47) | 34.6 (170) |
| 21+ cigs/day | 4.2 (15) | 3.0 (4) | 3.9 (19) |
| Mean (SD) dependence: FTND¶ | 5.0 (2.3) | 5.1 (2.5) | 5.0 (2.4) |
| Using NRT, % (N) | 35.6 (127) | 31.9 (135) | 34.6 (170) |
| Using other support, % (N) | 16.8 (60) | 24.4 (33) | 18.9 (93) |
| Phase 2 sample | |||
| Total (N) | 732 | 174 | 906 |
| From USA (N) | 162 | 16 | 178 |
| From Canada (N) | 29 | 2 | 31 |
| From France (N) | 259 | 60 | 319 |
| From the UK (N) | 188 | 71 | 259 |
| From Spain (N) | 94 | 25 | 119 |
| Mean (SD) age (years)* | 46.1 (7.5) | 44.7 (7.1) | 45.8 (7.4) |
| Married, % (N)** | 49.9 (364) | 48.3 (84) | 49.6 (448) |
| Female, % (N) | 46.3 (339) | 47.7 (83) | 46.6 (422) |
| White, % (N)†† | 95.0 (678) | 94.6 (158) | 94.9 (836) |
| Post secondary education, % (N)‡ | 60.5 (443) | 55.5 (96) | 59.6 (539) |
| Mean (SD) cigs per day§ | 18.0 (9.9) | 18.2 (9.8) | 18.0 (9.9) |
| Mean (SD) dependence: FTND‡‡ | 4.3 (2.4) | 4.4 (2.7) | 4.3 (2.5) |
| Using NRT, % (N) | 29.6 (217) | 29.3 (51) | 29.6 (268) |
| Using other support, % (N) | 15.4 (113) | 13.2 (23) | 15.0 (136) |
*p<0.05 difference between groups (t test).
†Data missing for 19 people.
‡Data missing for 1 person.
§In the phase 1 sample, respondents reported daily cigarette consumption in categories while, in the phase 2 sample, it was reported as a number.
¶Data missing for 3 people.
**Data missing for 3 people.
††Data missing for 25 people.
‡‡Data missing for 9 people.