Table 1.
Demographics and health- and smoking-related baseline characteristics of the study sample.
| Variable | Intervention n=372 |
Control n=383 |
Total N=755 |
P a | |
| Gender, n (%) |
|
|
|
|
|
|
|
Male | 191 (51.3) | 172 (44.9) | 363 (48.1) | .08b |
|
|
Female | 181 (48.7) | 211 (55.1) | 392 (51.9) |
|
| Age, mean (SD) | 18.2 (2.4) | 18.3 (2.2) | 18.2 (2.3) | .56c | |
| Immigration background, n (%) |
|
|
|
.89b | |
|
|
No immigration background | 196 (52.7) | 206 (53.8) | 402 (53.2) |
|
|
|
One parent born outside Switzerland | 75 (20.2) | 79 (20.6) | 154 (20.4) |
|
|
|
Both parents born outside Switzerland | 101 (27.2) | 98 (25.6) | 199 (26.4) |
|
| Education, n (%) |
|
|
|
.68b | |
|
|
None | 14 (3.8) | 11 (2.9) | 25 (3.3) |
|
|
|
Secondary school | 290 (78.0) | 301 (78.6) | 591 (78.3) |
|
|
|
Extended secondary school | 59 (15.9) | 56 (14.6) | 115 (15.2) |
|
|
|
Technical or high school | 9 (2.4) | 15 (3.9) | 24 (3.2) |
|
| Hazardous drinking, n (%) |
|
|
|
.03b | |
|
|
No | 76 (20.4) | 55 (14.4) | 131 (17.4) |
|
|
|
Yes | 296 (79.6) | 328 (85.6) | 624 (82.6) |
|
| Hours of extracurricular moderate to vigorous physical activity per week, mean (SD) | 4.0 (4.6) | 3.7 (5.0) | 3.8 (4.8) | .37c | |
| Tobacco smoking status, n (%) |
|
|
|
<.001b | |
|
|
Occasional smoker | 109 (29.3) | 69 (18.0) | 178 (23.6) |
|
|
|
Daily smoker | 263 (70.7) | 314 (82.0) | 577 (76.4) |
|
| Stage of change, n (%) |
|
|
|
.11b | |
|
|
No intention to quit | 86 (23.1) | 112 (29.2) | 198 (26.2) |
|
|
|
Considering quitting | 214 (57.5) | 211 (55.1) | 425 (56.3) |
|
|
|
Serious intention to quit | 72 (19.4) | 60 (15.7) | 132 (17.5) |
|
| Number of cigarettes smoked per day, mean (SD) | 9.6 (7.2) | 11.6 (7.9) | 10.6 (7.6) | <.001c | |
| Age of onset of smoking, mean (SD) | 15.1 (1.6) | 14.8 (1.7) | 15.0 (1.6) | .005c | |
| Previous quit attempts, n (%) |
|
|
|
.32b | |
|
|
0 | 148 (39.8) | 141 (36.8) | 289 (38.3) |
|
|
|
1 | 153 (41.1) | 178 (46.5) | 331 (43.8) |
|
|
|
2 or more | 71 (19.1) | 64 (16.7) | 135 (17.9) |
|
a P values for the comparison of intervention and control group participants.
bχ2 test.
c t test.