Table 2.
Passive smoking verified and not-verified by urine cotinine in the intervention and control group in the course of time.
| Time | Passive | |||||
|---|---|---|---|---|---|---|
| Intervention group (n (%)) | Control group (n (%)) | |||||
| No | Yes | Missing* | No | Yes | Missing* | |
| Verified by urine cotinine | ||||||
| 0 months | 0 (0) | 30 (100) | 0 (0) | 0 (0) | 28 (100) | 0 (0) |
| 3 months | 3 (10) | 17 (57) | 10 (33) | 0 (0) | 21 (75) | 7 (25) |
| 6 months | 7 (23) | 11 (37) | 12 (40) | 2 (7) | 19 (68) | 7 (25) |
| 9 months | 4 (13) | 13 (43) | 13 (43) | 0 (0) | 23 (82) | 5 (19) |
| 12 months | 5 (17) | 13 (43) | 12 (40) | 2 (7) | 19 (68) | 7 (25) |
| Not-verified by urine cotinine | ||||||
| 0 months | 0 (0) | 30 (100) | 0 (0) | 0 (0) | 28 (100) | 0 (0) |
| 3 months | 3 (10) | 17 (57) | 10 (33) | 0 (0) | 21 (75) | 7 (25) |
| 6 months | 8 (27) | 10 (33) | 12 (40) | 2 (7) | 19 (68) | 7 (25) |
| 9 months | 7 (23) | 10 (33) | 13 (43) | 2 (7) | 21 (75) | 5 (19) |
| 12 months | 6 (20) | 12 (40) | 12 (40) | 4 (14) | 17 (61) | 7 (25) |
*‘Missing’ include lost to follow-up as seen in Fig. 1 as well as families who were not lost to follow-up but were not able to participate with one/more of the measurements.