| All patients in the ETC group | Patients in the ETC group stratified according to the motivation to change smoking behaviour at baseline* | p Value | |||
| Unmotivated smokers | Ambivalent smokers | Motivated smokers | |||
| n = 515 (100%) | n = 286 (55.5%) | n = 165 (32.0%) | n = 64 (12.4%)† | ||
| No. of contacts during ETC, n (%): | |||||
| 0 (no ETC) | 43 (8.3) | 24 (8.4) | 16 (9.7) | 3 (4.7) | |
| 1 (“only” on-site counseling) | 64 (12.4) | 36 (12.6) | 19 (11.5) | 9 (14.1) | |
| 2 | 48 (9.3) | 30 (10.5) | 11 (6.7) | 7 (10.9) | 0.31‡ |
| 3 | 61 (11.8) | 41 (14.3) | 15 (9.1) | 5 (7.8) | |
| 4 | 69 (13.4) | 32 (11.2) | 27 (16.4) | 10 (15.6) | |
| 5 (complete ETC) | 230 (44.7)† | 123 (43.0) | 77 (46.7)† | 30 (46.9) | |
| Time of the on-site counselling in min (n = 472)§, median (range) | 13 (1–45) | 12 (1–45) | 15 (1–35) | 17 (1–35) | 0.002¶ |
| Only on-site counselling of 1–3 min (n = 472), n (%):§ | |||||
| Yes | 20 (4.2) | 11 (4.2) | 6 (4.0) | 3 (4.9) | 0.87‡ |
| Overall time of ETC in min (n = 472), median (range)§ | 30 (1–99) | 27 (1–75) | 34 (2–99) | 35 (1–77) | <0.001¶ |
| Received nicotine replacement therapy (n = 472), n (%):§ | |||||
| Yes | 70 (14.8) | 28 (10.7) | 28 (18.8) | 14 (23.0) | 0.004‡ |
| Agreed on a quitting day during the on-site counselling (n = 472), n (%):§ | |||||
| Yes | 83 (17.6) | 39 (14.9) | 28 (18.8) | 16 (26.2) | 0.036‡ |
Significant values are in bold.
*“When do you wish to stop smoking?” (“not within the next 6 months” = unmotivated smokers, “within the next 6 months but not within the next 4 weeks” = ambivalent smokers and “within the next 4 weeks” = motivated smokers); †does not sum up to 100% because of rounding error; ‡Mantel–Haenszel test for trend; §only those study participants who were allocated to intervention and received at least the on-site counselling; ¶Jonckheere–Terpstra test.