Table 1.
Characteristics of intervention and control groups at baseline. Values are numbers (percentages) unless stated otherwise
| Characteristics | Intervention group (n=213) | Control group (n=222) |
|---|---|---|
| Children | ||
| Mean age (years; range) | 7.7 (2.0-12.8) | 7.5 (2.1-12.9) |
| Male | 146 (68) | 139 (63) |
| Salivary cotinine concentration (ng/ml; geometric mean) | 2.83 | 2.91 |
| Regular contact with smokers in addition to parents | 114 (54) | 118 (53) |
| Parents | ||
| Mean age (years; range) | 32.7 (19.5-49.1) | 33.3 (20.5-53.8) |
| Male | 42 (20) | 48 (22) |
| Living with partner | 160 (75) | 170 (77) |
| Socioeconomic status | ||
| Completed higher education | 31 (15) | 38 (17) |
| Non-manual employment | 44 (21) | 47 (21) |
| Owner occupied accommodation | 81 (38) | 89 (40) |
| >1 person per room | 88 (41) | 88 (40) |
| Have a garden | 181 (85) | 176 (79) |
| Smoking status of index parents | ||
| Salivary cotinine concentration (ng/ml; arithmetic mean) | 344.8 | 365.3 |
| >20 cigarettes per day | 64 (30) | 74 (33) |
| >10 cigarettes per day in home | 70 (33) | 70 (32) |
| Smoke in room with child every day | 107 (50) | 118 (53) |
| With partner who smokes | 90 (42) | 89 (40) |
| Strong desire to stop smoking | 116 (54) | 129 (58) |